56712731 has 8 divisors (see below), whose sum is σ = 60449184. Its totient is φ = 53020800.

The previous prime is 56712713. The next prime is 56712767. The reversal of 56712731 is 13721765.

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-56712731 is a prime.

It is a super-2 number, since 2×56712731² = 6432667714956722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56712781) 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, 8480 + ... + 13613.

It is an arithmetic number, because the mean of its divisors is an integer number (7556148).

Almost surely, 2^56712731 is an apocalyptic number.

56712731 is a deficient number, since it is larger than the sum of its proper divisors (3736453).

56712731 is a wasteful number, since it uses less digits than its factorization.

56712731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22261.

The product of its digits is 8820, while the sum is 32.

The square root of 56712731 is about 7530.7855499941. The cubic root of 56712731 is about 384.2025005250.

The spelling of 56712731 in words is "fifty-six million, seven hundred twelve thousand, seven hundred thirty-one".