255653631 has 16 divisors (see below), whose sum is σ = 380845920. Its totient is φ = 169490880.

The previous prime is 255653617. The next prime is 255653641. The reversal of 255653631 is 136356552.

It is not a de Polignac number, because 255653631 - 2¹⁷ = 255522559 is a prime.

It is a super-2 number, since 2×255653631² = 130717558086968322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255653611) 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, 21270 + ... + 31043.

It is an arithmetic number, because the mean of its divisors is an integer number (23802870).

Almost surely, 2^255653631 is an apocalyptic number.

255653631 is a deficient number, since it is larger than the sum of its proper divisors (125192289).

255653631 is a wasteful number, since it uses less digits than its factorization.

255653631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52503 (or 52497 counting only the distinct ones).

The product of its digits is 81000, while the sum is 36.

The square root of 255653631 is about 15989.1723050319. The cubic root of 255653631 is about 634.6739235612.

The spelling of 255653631 in words is "two hundred fifty-five million, six hundred fifty-three thousand, six hundred thirty-one".