56 (number)
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56 (fifty-six) is the natural number following 55 and preceding 57.
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| Cardinal | fifty-six | ||
| Ordinal | 56th (fifty-sixth) | ||
| Factorization | <math>2^3\cdot 7<math> | ||
| Divisors | 2, 4, 7, 8, 14, 28 | ||
| Roman numeral | LVI | ||
| Binary | 111000 | ||
| Hexadecimal | 38 | ||
In mathematics
56 is the sum of the first six triangular numbers (making it a tetrahedral number), as well as the sum of six consecutive primes (3 + 5 + 7 + 11 + 13 + 17). It is also a tetranacci number and a pronic number.
In science
- The atomic number of barium
In astronomy,
- Messier object M56, a magnitude 9.5 globular cluster in the constellation Lyra
- The New General Catalogue object (http://www.ngcic.org/) NGC 56, an unverified object in the constellation Pisces. NGC 76 does not appear to be a real object.
- The Saros number (http://sunearth.gsfc.nasa.gov/eclipse/SEsaros/SEsaros1-175.html) of the solar eclipse series which began on -1172 July 17 and ended on 144 September 15. The duration of Saros series 56 was 1316.2 years, and it contained 74 solar eclipses.
- The Saros number (http://sunearth.gsfc.nasa.gov/eclipse/LEsaros/LEsaros1-175.html) of the lunar eclipse series which began on -852 May 7 and ended on 428 June 13. The duration of Saros series 56 was 1280.1 years, and it contained 72 lunar eclipses.
In other fields
56 is also: .
- The number of men who signed the United States Declaration of Independence.
- The code for international direct dial phone calls to Chile.
- The maximum speed of analog data transmission over a POTS in the 20th century was 56 kbit/s.
- The name of the town Fifty-Six, Arkansas.
- The number of men of Netophah at the Census of men of Israel upon return from exile (Holy Bible, Ezra 2:22).
- The year AD 56, 56 BC, or 1956, and thus the symbol of the anti-Soviet revolution in Hungary.
- In baseball, the number of consecutive games in which Joe DiMaggio had a base hit in 1941, still a record.eo:Kvindek ses