631621256 has 32 divisors (see below), whose sum is σ = 1424712000. Its totient is φ = 256447296.

The previous prime is 631621241. The next prime is 631621273. The reversal of 631621256 is 652126136.

It is a super-2 number, since 2×631621256² = 797890822062035072, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 295751 + ... + 297878.

It is an arithmetic number, because the mean of its divisors is an integer number (44522250).

Almost surely, 2^631621256 is an apocalyptic number.

It is an amenable number.

631621256 is an abundant number, since it is smaller than the sum of its proper divisors (793090744).

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

631621256 is a wasteful number, since it uses less digits than its factorization.

631621256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593661 (or 593657 counting only the distinct ones).

The product of its digits is 12960, while the sum is 32.

The square root of 631621256 is about 25132.0762373505. The cubic root of 631621256 is about 857.9966239274.

It can be divided in two parts, 6316 and 21256, that added together give a palindrome (27572).

The spelling of 631621256 in words is "six hundred thirty-one million, six hundred twenty-one thousand, two hundred fifty-six".