63575631 has 64 divisors (see below), whose sum is σ = 116674560. Its totient is φ = 33384960.

The previous prime is 63575599. The next prime is 63575639. The reversal of 63575631 is 13657536.

It is a happy number.

It is not a de Polignac number, because 63575631 - 2⁵ = 63575599 is a prime.

It is a super-2 number, since 2×63575631² = 8083721714096322, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63575639) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 150801 + ... + 151221.

It is an arithmetic number, because the mean of its divisors is an integer number (1823040).

Almost surely, 2^63575631 is an apocalyptic number.

63575631 is a deficient number, since it is larger than the sum of its proper divisors (53098929).

63575631 is a wasteful number, since it uses less digits than its factorization.

63575631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501 (or 495 counting only the distinct ones).

The product of its digits is 56700, while the sum is 36.

The square root of 63575631 is about 7973.4328240727. The cubic root of 63575631 is about 399.1139365951.

The spelling of 63575631 in words is "sixty-three million, five hundred seventy-five thousand, six hundred thirty-one".