631564 has 12 divisors (see below), whose sum is σ = 1132488. Its totient is φ = 308000.

The previous prime is 631559. The next prime is 631573. The reversal of 631564 is 465136.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1762 + ... + 2089.

It is an arithmetic number, because the mean of its divisors is an integer number (94374).

2⁶³¹⁵⁶⁴ is an apocalyptic number.

It is an amenable number.

631564 is a deficient number, since it is larger than the sum of its proper divisors (500924).

631564 is a wasteful number, since it uses less digits than its factorization.

631564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3896 (or 3894 counting only the distinct ones).

The product of its digits is 2160, while the sum is 25.

The square root of 631564 is about 794.7100100036. The cubic root of 631564 is about 85.7970697557.

The spelling of 631564 in words is "six hundred thirty-one thousand, five hundred sixty-four".