255565257 has 12 divisors (see below), whose sum is σ = 359633520. Its totient is φ = 161408952.

The previous prime is 255565243. The next prime is 255565291. The reversal of 255565257 is 752565552.

It is not a de Polignac number, because 255565257 - 2⁴ = 255565241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (255565157) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 116907 + ... + 119072.

It is an arithmetic number, because the mean of its divisors is an integer number (29969460).

Almost surely, 2^255565257 is an apocalyptic number.

It is an amenable number.

255565257 is a deficient number, since it is larger than the sum of its proper divisors (104068263).

255565257 is a wasteful number, since it uses less digits than its factorization.

255565257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236020 (or 236001 counting only the distinct ones).

The product of its digits is 525000, while the sum is 42.

The square root of 255565257 is about 15986.4085084799. The cubic root of 255565257 is about 634.6007840597.

The spelling of 255565257 in words is "two hundred fifty-five million, five hundred sixty-five thousand, two hundred fifty-seven".