255657285 has 36 divisors (see below), whose sum is σ = 479863332. Its totient is φ = 125858304.

The previous prime is 255657277. The next prime is 255657307. The reversal of 255657285 is 582756552.

255657285 is a `hidden beast` number, since 2 + 5 + 565 + 7 + 2 + 85 = 666.

255657285 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 99082116 + 156575169 = 9954^2 + 12513^2 .

It is not a de Polignac number, because 255657285 - 2³ = 255657277 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 255657285.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 9204 + ... + 24413.

It is an arithmetic number, because the mean of its divisors is an integer number (13329537).

Almost surely, 2^255657285 is an apocalyptic number.

It is an amenable number.

255657285 is a deficient number, since it is larger than the sum of its proper divisors (224206047).

255657285 is a wasteful number, since it uses less digits than its factorization.

255657285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33654 (or 33638 counting only the distinct ones).

The product of its digits is 840000, while the sum is 45.

The square root of 255657285 is about 15989.2865694502. The cubic root of 255657285 is about 634.6769472975.

The spelling of 255657285 in words is "two hundred fifty-five million, six hundred fifty-seven thousand, two hundred eighty-five".