56730731 has 8 divisors (see below), whose sum is σ = 58381680. Its totient is φ = 55086048.

The previous prime is 56730727. The next prime is 56730733. The reversal of 56730731 is 13703765.

56730731 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 not a de Polignac number, because 56730731 - 2² = 56730727 is a prime.

It is a super-2 number, since 2×56730731² = 6436751679588722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56730733) 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, 21665 + ... + 24141.

It is an arithmetic number, because the mean of its divisors is an integer number (7297710).

Almost surely, 2^56730731 is an apocalyptic number.

56730731 is a deficient number, since it is larger than the sum of its proper divisors (1650949).

56730731 is a wasteful number, since it uses less digits than its factorization.

56730731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3133.

The product of its (nonzero) digits is 13230, while the sum is 32.

The square root of 56730731 is about 7531.9805496297. The cubic root of 56730731 is about 384.2431434481.

The spelling of 56730731 in words is "fifty-six million, seven hundred thirty thousand, seven hundred thirty-one".