255931407 has 10 divisors (see below), whose sum is σ = 382317408. Its totient is φ = 170620884.

The previous prime is 255931343. The next prime is 255931421. The reversal of 255931407 is 704139552.

255931407 is a `hidden beast` number, since 25 + 593 + 1 + 40 + 7 = 666.

It is not a de Polignac number, because 255931407 - 2⁶ = 255931343 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255931427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1579743 + ... + 1579904.

Almost surely, 2^255931407 is an apocalyptic number.

255931407 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

255931407 is a deficient number, since it is larger than the sum of its proper divisors (126386001).

255931407 is an equidigital number, since it uses as much as digits as its factorization.

255931407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3159659 (or 3159650 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The square root of 255931407 is about 15997.8563251456. The cubic root of 255931407 is about 634.9037049921.

It can be divided in two parts, 25593 and 1407, that added together give a cube (27000 = 30³).

The spelling of 255931407 in words is "two hundred fifty-five million, nine hundred thirty-one thousand, four hundred seven".