56313721 has 8 divisors (see below), whose sum is σ = 57322944. Its totient is φ = 55310640.

The previous prime is 56313709. The next prime is 56313767. The reversal of 56313721 is 12731365.

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-56313721 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56313721.

It is not an unprimeable number, because it can be changed into a prime (56313781) 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, 19450 + ... + 22156.

It is an arithmetic number, because the mean of its divisors is an integer number (7165368).

Almost surely, 2^56313721 is an apocalyptic number.

It is an amenable number.

56313721 is a deficient number, since it is larger than the sum of its proper divisors (1009223).

56313721 is a wasteful number, since it uses less digits than its factorization.

56313721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3071.

The product of its digits is 3780, while the sum is 28.

The square root of 56313721 is about 7504.2468642763. The cubic root of 56313721 is about 383.2993430899.

The spelling of 56313721 in words is "fifty-six million, three hundred thirteen thousand, seven hundred twenty-one".