33 (number)
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33 is the natural number following 32 and preceding 34.
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| Cardinal | thirty-three | ||
| Ordinal | 33rd (thirty-third) | ||
| Factorization | <math>3\cdot 11<math> | ||
| Roman numeral | XXXIII | ||
| Binary | 100001 | ||
| Hexadecimal | 21 | ||
In mathematics
33 is the smallest 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).
In science
- The atomic number of arsenic
In astronomy,
- Messier object M33, a magnitude 7.0 galaxy in the constellation Triangulum, also known as the Triangulum Galaxy.
- The New General Catalogue object (http://www.ngcic.org/) NGC 33, a double star in the constellation Pisces
- The Saros number (http://sunearth.gsfc.nasa.gov/eclipse/SEsaros/SEsaros1-175.html) 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 (http://sunearth.gsfc.nasa.gov/eclipse/LEsaros/LEsaros1-175.html) 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 other fields
Thirty-three is also:
- 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.
- A highly significant number to the Freemasons, and is one of their sacred numbers, recurring profusely throughout their 'Dogma' (as Albert Pike calls it), rituals and other miscellaneous places.
- Many people claim that they see, witness, or experience the number 33 in unusual circumstances or at a frequency that defies statistical likelihood. A popular website [1] (http://home.earthlink.net/~ktd_33/index.html) dedicated to this repdigit, and such experiences of it, hosts comments by many such people, as well as other related resources.
- A significant number in modern numerology, as it is 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.
- In Spanish, the "smile to the camera" word, as is "cheese" in English. Diga treinta y tres, is the same as "say cheese".
- The code for international direct dial phone calls to France.
- Historical years: 33 A.D., 33 B.C., or 1933
- A normal human spine has 33 vertebrae where the bones that form the coccyx are counted individually.
es:Treinta y tres
eo:Tridek tri fr:33 (nombre) ko:33 ia:33 it:Trentatré nl:33 (getal) ja:33 no:33 (tall) pt:Trinta e três sl:33 (število) sv:33 (tal) zh:33