33 (thirty-three) is the natural number following 32 and preceding 34.
| Cardinal | 33 thirty-three |
| Ordinal | 33rd thirty-third |
| Factorization | <math>3\cdot 11</math> |
| Divisors | 1, 3, 11, 33 |
| Roman numeral | XXXIII |
| Binary | 100001 |
| Hexadecimal | 21 |
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In mathematics
33 is the largest positive integer that can not be expressed as a sum of different triangular numbers. It is also the smallest odd repdigit that's not prime (unless we consider 1-digit integers to also be repdigits). 33 is the eighth distinct biprime comprising the prime factors (3.11). Its aliquot sum is 15; itself a discrete biprime (3.5) in the following Aliquot sequence 33,15,9,4,3,1,0. (Note 33 is the 8th composite number to descend into the prime number 3, the others outside of this sequence being 30,26,16,12) The sum of the first four factorials is 33. Adding up the sums of divisors for the 1 through 6 yields 33. 33 is the smallest integer such that it and the next two integers all have the same number of divisors. It is also the first member of the first cluster of three biprimes (33,34,35); the next such cluster is (85,86,87).
In science
- The atomic number of arsenic
Astronomy
- Messier object M33, a magnitude 7.0 galaxy in the constellation Triangulum, also known as the \]] object NGC 33, a double star in the constellation Pisces
- The Saros number of the solar eclipse series which began on -1982 August 2 and ended on -485 January 17. The duration of Saros series 33 was 1496.5 years, and it contained 84 solar eclipses.
- The Saros number of the lunar eclipse series which began on -1662 May 22 and ended on -364 July 10. The duration of Saros series 33 was 1298.1 years, and it contained 73 lunar eclipses.
In religion
- Lag Ba'omer is a minor Jewish holiday which falls on the 33rd day of the Omer
- Jesus's age when he was crucified in 33 A.D., according to many, though not verified historically.
In sports
- The number of innings played in the longest baseball game in history (a 1981 minor league game between the Rochester Red Wings and the Pawtucket Red Sox in Pawtucket, Rhode Island).
- Retired numbers of former basketball star Larry Bird, Kareem Abdul-Jabbar, and former baseball star Eddie Murray.
- Number of retired hockey goalie Patrick Roy.
- Jersey number of basketball player Patrick Ewing. The number was retired on February 28, 2003 by the New York Knicks.
- Jersey number of basketball player Scottie Pippen. The number was retired on December 9, 2005 by the Chicago Bulls.
- Number also worn by Grant Hill and Alonzo Mourning.
- Scott Wimmer's Nextel Cup Series number for Richard Childress Racing sponsored by Holiday Inn
- Common misperception is that in Freemasonry the 33rd Degree level, initiates are fully apprised of the Luciferic theology taught and believed by top, "inner-court" Masons. There is however no truth to this allegation
In other fields
Thirty-three is:
- Alexander the Great died at the age of thirty-three
- On most occasions, the traditional number of racers in the Indianapolis 500
- In reference to gramophone records, 33 refers to a type of record by its revolution speed of 33⅓ revolutions per minute. 33s are also known as long playing records, or LPs. See: 78 and 45
- The best-known car number of retired NASCAR driver Harry Gant
- A significant number in modern numerology, one of the master numbers along with 11 and 22
- A song by the Smashing Pumpkins on their Mellon Collie and the Infinite Sadness album. Also a song by Coheed and Cambria on their The Second Stage Turbine Blade album (the songs are not related)
- The title of the first episode of the new Battlestar Galactica television series
- In Spanish, the "smile to the camera" word, as is "cheese" in English. Diga treinta y tres ("Say thirty-three") is the same as "Say cheese"
- In French, Italian, Romanian, Spanish and Portuguese, the word a patient is usually asked to say when a doctor is listening to his or her lungs with a stethoscope (Trente-Trois, Trentatrè, Treizeci şi trei, Treinta y Tres and Trinta e Três)
- The code for international direct-dial phone calls to France
- A normal human spine has 33 vertebrae when the bones that form the coccyx are counted individually
- The number printed on all Rolling Rock beer labels
- Number of Cantos in each of Dante's 3 parts of The Divine Comedy
- Number of maximum European Credit Transfer and Accumulation System credits that Instituto Superior Técnico's students are allowed to achieve throughout one semester
- The namesake of the private club, Club 33, located in Disneyland's New Orleans Square.
- The Scottish Rite of Freemasonry has 33 degrees.
- Number of victims, including the suspect, that were all killed at Virginia Tech, April 16, 2007.
- The double triangle is another word for, "33."
- 33 were Uruguay's national Independence Heroes that liberate the country in 1825 from the Brazilian Empire, they are populary known as "Treinta y Tres Orientales" (The Thirty-Three Orientals ), one of Uruguay's national states and its capital city is named " Treinta y Tres" after them.
- A religious image of the Virgin Mary from the XVIII Century is known in Uruguay as "Virgen de los Treinta y Tres" (Virgin of the Thity-Three) consecrated by Pope John Paul II in his visit to Uruguay in 1988.
Historical years
33 A.D., 33 B.C., 1933, 2033, etc.
References
- Prime Curios! 33 from the Prime Pages
