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Fifty-one

For the year A.D. 51, see 51.

Fifty-one (51, LI) is the natural number following fifty and preceeding fifty-two. Its divisors are 1, 3, 17, and 51; its factorisation is

Fifty-one is also:

The atomic number of antimony.
The code for international direct dial phone calls to Peru.
Part of the title of a collection of stories by Lord Dunsany, Fifty-One Tales.

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This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Fifty-one".