56631871 has 8 divisors (see below), whose sum is σ = 57494304. Its totient is φ = 55776000.

The previous prime is 56631863. The next prime is 56631877. The reversal of 56631871 is 17813665.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56631871 - 2³ = 56631863 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56631871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56631877) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17371 + ... + 20371.

It is an arithmetic number, because the mean of its divisors is an integer number (7186788).

Almost surely, 2^56631871 is an apocalyptic number.

56631871 is a deficient number, since it is larger than the sum of its proper divisors (862433).

56631871 is a wasteful number, since it uses less digits than its factorization.

56631871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3281.

The product of its digits is 30240, while the sum is 37.

The square root of 56631871 is about 7525.4150051675. The cubic root of 56631871 is about 384.0198173185.

The spelling of 56631871 in words is "fifty-six million, six hundred thirty-one thousand, eight hundred seventy-one".