255310631 has 4 divisors (see below), whose sum is σ = 255519264. Its totient is φ = 255102000.

The previous prime is 255310579. The next prime is 255310639. The reversal of 255310631 is 136013552.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 255310631 - 2¹⁸ = 255048487 is a prime.

It is a super-2 number, since 2×255310631² = 130367036603236322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 255310631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255310639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102470 + ... + 104931.

It is an arithmetic number, because the mean of its divisors is an integer number (63879816).

Almost surely, 2^255310631 is an apocalyptic number.

255310631 is a deficient number, since it is larger than the sum of its proper divisors (208633).

255310631 is a wasteful number, since it uses less digits than its factorization.

255310631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208632.

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 255310631 is about 15978.4426963331. The cubic root of 255310631 is about 634.3899578636.

The spelling of 255310631 in words is "two hundred fifty-five million, three hundred ten thousand, six hundred thirty-one".