631571264 has 28 divisors (see below), whose sum is σ = 1260221508. Its totient is φ = 314035200.

The previous prime is 631571263. The next prime is 631571287. The reversal of 631571264 is 462175136.

It can be written as a sum of positive squares in 2 ways, for example, as 93702400 + 537868864 = 9680^2 + 23192^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631571261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15677 + ... + 38844.

It is an arithmetic number, because the mean of its divisors is an integer number (45007911).

Almost surely, 2^631571264 is an apocalyptic number.

631571264 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

631571264 is a deficient number, since it is larger than the sum of its proper divisors (628650244).

631571264 is a wasteful number, since it uses less digits than its factorization.

631571264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54714 (or 54704 counting only the distinct ones).

The product of its digits is 30240, while the sum is 35.

The square root of 631571264 is about 25131.0816321144. The cubic root of 631571264 is about 857.9739868916.

The spelling of 631571264 in words is "six hundred thirty-one million, five hundred seventy-one thousand, two hundred sixty-four".