223

This number is a prime.

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The sums of the nth powers of its digits are prime for all n between 1 and 6 inclusive: sum of digits = 7, sum of squares of digits = 17, sum of cubes of digits = 43, sum of fourth powers = 113, sum of fifth powers = 307 and sum of sixth powers = 857. [Trotter]

Submitted: 2001-12-07 16:20:55;   Last Modified: 2008-04-08 22:13:03.
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