631512256 has 28 divisors (see below), whose sum is σ = 1254300768. Its totient is φ = 315468032.

The previous prime is 631512251. The next prime is 631512281. The reversal of 631512256 is 652215136.

It is not an unprimeable number, because it can be changed into a prime (631512251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77865 + ... + 85591.

It is an arithmetic number, because the mean of its divisors is an integer number (44796456).

Almost surely, 2^631512256 is an apocalyptic number.

It is an amenable number.

631512256 is a deficient number, since it is larger than the sum of its proper divisors (622788512).

631512256 is a wasteful number, since it uses less digits than its factorization.

631512256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9016 (or 9006 counting only the distinct ones).

The product of its digits is 10800, while the sum is 31.

The square root of 631512256 is about 25129.9076003076. The cubic root of 631512256 is about 857.9472657551.

The spelling of 631512256 in words is "six hundred thirty-one million, five hundred twelve thousand, two hundred fifty-six".