32423

This number is a prime.

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The sum of ten numbers such that each one gives a prime for the property sigma(x)-x , i.e., 32423 = 2^2 + 2^3 + 3^3 + 2^5 + 5^3 + 2^7 + 3^7 + 17^3 + 2^13 + 7^5. Note that each of these numbers and theirs exponents are either a power of 2, a Mersenne or Fermat prime. [Sariyar]