255910831 has 8 divisors (see below), whose sum is σ = 279302400. Its totient is φ = 232540440.

The previous prime is 255910801. The next prime is 255910841. The reversal of 255910831 is 138019552.

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

It is a de Polignac number, because none of the positive numbers 2^k-255910831 is a prime.

It is a super-2 number, since 2×255910831² = 130980706846221122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255910801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30580 + ... + 38038.

It is an arithmetic number, because the mean of its divisors is an integer number (34912800).

Almost surely, 2^255910831 is an apocalyptic number.

255910831 is a deficient number, since it is larger than the sum of its proper divisors (23391569).

255910831 is a wasteful number, since it uses less digits than its factorization.

255910831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10589.

The product of its (nonzero) digits is 10800, while the sum is 34.

The square root of 255910831 is about 15997.2132260591. The cubic root of 255910831 is about 634.8866898488.

The spelling of 255910831 in words is "two hundred fifty-five million, nine hundred ten thousand, eight hundred thirty-one".