56531636 has 12 divisors (see below), whose sum is σ = 113063328. Its totient is φ = 24227832.

The previous prime is 56531633. The next prime is 56531641. The reversal of 56531636 is 63613565.

56531636 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 56531596 and 56531605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56531633) 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, 1009466 + ... + 1009521.

It is an arithmetic number, because the mean of its divisors is an integer number (9421944).

Almost surely, 2^56531636 is an apocalyptic number.

It is an amenable number.

56531636 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

56531636 is a wasteful number, since it uses less digits than its factorization.

56531636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2018998 (or 2018996 counting only the distinct ones).

The product of its digits is 48600, while the sum is 35.

The square root of 56531636 is about 7518.7522901077. The cubic root of 56531636 is about 383.7931195380.

The spelling of 56531636 in words is "fifty-six million, five hundred thirty-one thousand, six hundred thirty-six".