56859631 has 4 divisors (see below), whose sum is σ = 58181992. Its totient is φ = 55537272.

The previous prime is 56859629. The next prime is 56859653. The reversal of 56859631 is 13695865.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 56859631 - 2¹ = 56859629 is a prime.

It is a super-2 number, since 2×56859631² = 6466035274912322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (43), and also a Moran number because the ratio is a prime number: 1322317 = 56859631 / (5 + 6 + 8 + 5 + 9 + 6 + 3 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56859431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 661116 + ... + 661201.

It is an arithmetic number, because the mean of its divisors is an integer number (14545498).

Almost surely, 2^56859631 is an apocalyptic number.

56859631 is a deficient number, since it is larger than the sum of its proper divisors (1322361).

56859631 is a wasteful number, since it uses less digits than its factorization.

56859631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1322360.

The product of its digits is 194400, while the sum is 43.

The square root of 56859631 is about 7540.5325408753. The cubic root of 56859631 is about 384.5339410189.

The spelling of 56859631 in words is "fifty-six million, eight hundred fifty-nine thousand, six hundred thirty-one".