255831831 has 8 divisors (see below), whose sum is σ = 379010160. Its totient is φ = 170554536.

The previous prime is 255831791. The next prime is 255831833. The reversal of 255831831 is 138138552.

It is not a de Polignac number, because 255831831 - 2⁶ = 255831767 is a prime.

It is a super-2 number, since 2×255831831² = 130899851505625122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255831833) 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, 4737600 + ... + 4737653.

It is an arithmetic number, because the mean of its divisors is an integer number (47376270).

Almost surely, 2^255831831 is an apocalyptic number.

255831831 is a deficient number, since it is larger than the sum of its proper divisors (123178329).

255831831 is an equidigital number, since it uses as much as digits as its factorization.

255831831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9475262 (or 9475256 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 255831831 is about 15994.7438554045. The cubic root of 255831831 is about 634.8213530147.

The spelling of 255831831 in words is "two hundred fifty-five million, eight hundred thirty-one thousand, eight hundred thirty-one".