255731 has 12 divisors (see below), whose sum is σ = 316008. Its totient is φ = 205632.

The previous prime is 255713. The next prime is 255733. The reversal of 255731 is 137552.

It is not a de Polignac number, because 255731 - 2⁶ = 255667 is a prime.

It is a super-2 number, since 2×255731² = 130796688722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 255697 and 255706.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 255731.

It is not an unprimeable number, because it can be changed into a prime (255733) 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 11 ways as a sum of consecutive naturals, for example, 680 + ... + 986.

It is an arithmetic number, because the mean of its divisors is an integer number (26334).

2²⁵⁵⁷³¹ is an apocalyptic number.

255731 is a deficient number, since it is larger than the sum of its proper divisors (60277).

255731 is a wasteful number, since it uses less digits than its factorization.

255731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338 (or 331 counting only the distinct ones).

The product of its digits is 1050, while the sum is 23.

The square root of 255731 is about 505.6985267924. The cubic root of 255731 is about 63.4737941342.

The spelling of 255731 in words is "two hundred fifty-five thousand, seven hundred thirty-one".