631564500 has 96 divisors (see below), whose sum is σ = 2101881600. Its totient is φ = 144355200.

The previous prime is 631564481. The next prime is 631564511. The reversal of 631564500 is 5465136.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19575 + ... + 40574.

It is an arithmetic number, because the mean of its divisors is an integer number (21894600).

Almost surely, 2^631564500 is an apocalyptic number.

631564500 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

631564500 is an abundant number, since it is smaller than the sum of its proper divisors (1470317100).

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

631564500 is a wasteful number, since it uses less digits than its factorization.

631564500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60178 (or 60166 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 631564500 is about 25130.9470573634. The cubic root of 631564500 is about 857.9709239716.

The spelling of 631564500 in words is "six hundred thirty-one million, five hundred sixty-four thousand, five hundred".