56137731 has 8 divisors (see below), whose sum is σ = 80608080. Its totient is φ = 34546272.

The previous prime is 56137727. The next prime is 56137771. The reversal of 56137731 is 13773165.

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

It is not a de Polignac number, because 56137731 - 2² = 56137727 is a prime.

It is a super-2 number, since 2×56137731² = 6302889683656722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 56137692 and 56137701.

It is not an unprimeable number, because it can be changed into a prime (56137771) 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, 719676 + ... + 719753.

It is an arithmetic number, because the mean of its divisors is an integer number (10076010).

Almost surely, 2^56137731 is an apocalyptic number.

56137731 is a deficient number, since it is larger than the sum of its proper divisors (24470349).

56137731 is a wasteful number, since it uses less digits than its factorization.

56137731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1439445.

The product of its digits is 13230, while the sum is 33.

The square root of 56137731 is about 7492.5116616526. The cubic root of 56137731 is about 382.8996344349.

The spelling of 56137731 in words is "fifty-six million, one hundred thirty-seven thousand, seven hundred thirty-one".