255656 has 8 divisors (see below), whose sum is σ = 479370. Its totient is φ = 127824.

The previous prime is 255653. The next prime is 255659. The reversal of 255656 is 656552.

It is an interprime number because it is at equal distance from previous prime (255653) and next prime (255659).

It can be written as a sum of positive squares in only one way, i.e., 184900 + 70756 = 430^2 + 266^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (255653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15971 + ... + 15986.

2²⁵⁵⁶⁵⁶ is an apocalyptic number.

It is an amenable number.

255656 is a deficient number, since it is larger than the sum of its proper divisors (223714).

255656 is a wasteful number, since it uses less digits than its factorization.

255656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31963 (or 31959 counting only the distinct ones).

The product of its digits is 9000, while the sum is 29.

The square root of 255656 is about 505.6243665015. The cubic root of 255656 is about 63.4675883945.

The spelling of 255656 in words is "two hundred fifty-five thousand, six hundred fifty-six".