56631501 has 16 divisors (see below), whose sum is σ = 84844800. Its totient is φ = 37328544.

The previous prime is 56631499. The next prime is 56631503. The reversal of 56631501 is 10513665.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (56631499) and next prime (56631503).

It is not a de Polignac number, because 56631501 - 2¹ = 56631499 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56631503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9381 + ... + 14186.

It is an arithmetic number, because the mean of its divisors is an integer number (5302800).

Almost surely, 2^56631501 is an apocalyptic number.

It is an amenable number.

56631501 is a deficient number, since it is larger than the sum of its proper divisors (28213299).

56631501 is a wasteful number, since it uses less digits than its factorization.

56631501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23665 (or 23659 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 56631501 is about 7525.3904217655. The cubic root of 56631501 is about 384.0189809954.

The spelling of 56631501 in words is "fifty-six million, six hundred thirty-one thousand, five hundred one".