255565431 has 36 divisors (see below), whose sum is σ = 407559880. Its totient is φ = 154202400.

The previous prime is 255565421. The next prime is 255565493. The reversal of 255565431 is 134565552.

255565431 is a `hidden beast` number, since 2 + 55 + 565 + 43 + 1 = 666.

It is not a de Polignac number, because 255565431 - 2⁵ = 255565399 is a prime.

It is a super-2 number, since 2×255565431² = 130627379044431522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255565421) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 360105 + ... + 360813.

Almost surely, 2^255565431 is an apocalyptic number.

255565431 is a deficient number, since it is larger than the sum of its proper divisors (151994449).

255565431 is a wasteful number, since it uses less digits than its factorization.

255565431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1068 (or 1054 counting only the distinct ones).

The product of its digits is 90000, while the sum is 36.

The square root of 255565431 is about 15986.4139506019. The cubic root of 255565431 is about 634.6009280809.

The spelling of 255565431 in words is "two hundred fifty-five million, five hundred sixty-five thousand, four hundred thirty-one".