255630931 has 8 divisors (see below), whose sum is σ = 261066128. Its totient is φ = 250236000.

The previous prime is 255630923. The next prime is 255630937. The reversal of 255630931 is 139036552.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 255630931 - 2³ = 255630923 is a prime.

It is a super-2 number, since 2×255630931² = 130694345767853522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255630937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2941 + ... + 22801.

It is an arithmetic number, because the mean of its divisors is an integer number (32633266).

Almost surely, 2^255630931 is an apocalyptic number.

255630931 is a deficient number, since it is larger than the sum of its proper divisors (5435197).

255630931 is a wasteful number, since it uses less digits than its factorization.

255630931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20133.

The product of its (nonzero) digits is 24300, while the sum is 34.

The square root of 255630931 is about 15988.4624338928. The cubic root of 255630931 is about 634.6551383472.

The spelling of 255630931 in words is "two hundred fifty-five million, six hundred thirty thousand, nine hundred thirty-one".