255568551 has 16 divisors (see below), whose sum is σ = 389664000. Its totient is φ = 145954368.

The previous prime is 255568543. The next prime is 255568553. The reversal of 255568551 is 155865552.

It is a happy number.

It is not a de Polignac number, because 255568551 - 2³ = 255568543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255568553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60300 + ... + 64398.

It is an arithmetic number, because the mean of its divisors is an integer number (24354000).

Almost surely, 2^255568551 is an apocalyptic number.

255568551 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

255568551 is a deficient number, since it is larger than the sum of its proper divisors (134095449).

255568551 is a wasteful number, since it uses less digits than its factorization.

255568551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7078.

The product of its digits is 300000, while the sum is 42.

The square root of 255568551 is about 15986.5115331645. The cubic root of 255568551 is about 634.6035105205.

The spelling of 255568551 in words is "two hundred fifty-five million, five hundred sixty-eight thousand, five hundred fifty-one".