50

50 (fifty) is a positive integer following 49 and preceding 51. Its ordinal form is written "fiftieth" or 50th.
== Properties ==
*50 is an .
*50 is the number of known Mersenne primes and perfect numbers.
*Szekeres snark has 50 bertices.MathWorld, Szekeres Snark
*50 is the number of US states.
== In googology ==
In Greek-based number-naming systems, 50 is associated with prefix "pentaconta-", and with prefix "quinquaginti-" in Latin systems.
== Currency-related use ==
*Some currencies, such as the , the (shekel-wise) and the , have banknotes with this number in the denomination.
*Some currencies, such as the , the (Agorot-wise in the half-shekel coin) and the , have coins with this number in the denomination.
It is also the prize for correctly answering the first question in the German game show in euros.
== In chess ==
There is a preventing endless chess games.
== Sources ==
Category:Numbers
Category:Banknote denominations
Category:Class 1
Category:Chess
Category:Coin denominations
Category:Game show prizes
Category:Non-powers
Category:Numbers 0-99
Category:Numbers with 1 to 2 digits