631256256 has 42 divisors (see below), whose sum is σ = 1809383732. Its totient is φ = 210418560.

The previous prime is 631256233. The next prime is 631256267. The reversal of 631256256 is 652652136.

It is a happy number.

631256256 is a `hidden beast` number, since 6 + 3 + 1 + 25 + 625 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 631256256.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 547390 + ... + 548541.

Almost surely, 2^631256256 is an apocalyptic number.

It is an amenable number.

631256256 is an abundant number, since it is smaller than the sum of its proper divisors (1178127476).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

631256256 is a wasteful number, since it uses less digits than its factorization.

631256256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1095949 (or 1095936 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 631256256 is about 25124.8135515470. The cubic root of 631256256 is about 857.8313196365.

The spelling of 631256256 in words is "six hundred thirty-one million, two hundred fifty-six thousand, two hundred fifty-six".