56642531 has 8 divisors (see below), whose sum is σ = 62958384. Its totient is φ = 50521120.

The previous prime is 56642519. The next prime is 56642557. The reversal of 56642531 is 13524665.

56642531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56642531 is a prime.

It is a super-2 number, since 2×56642531² = 6416752636171922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56642231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47996 + ... + 49161.

It is an arithmetic number, because the mean of its divisors is an integer number (7869798).

Almost surely, 2^56642531 is an apocalyptic number.

56642531 is a deficient number, since it is larger than the sum of its proper divisors (6315853).

56642531 is a wasteful number, since it uses less digits than its factorization.

56642531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97221.

The product of its digits is 21600, while the sum is 32.

The square root of 56642531 is about 7526.1232384276. The cubic root of 56642531 is about 384.0439109037.

The spelling of 56642531 in words is "fifty-six million, six hundred forty-two thousand, five hundred thirty-one".