56718881 has 8 divisors (see below), whose sum is σ = 57767904. Its totient is φ = 55679680.

The previous prime is 56718877. The next prime is 56718929. The reversal of 56718881 is 18881765.

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

It is a cyclic number.

It is not a de Polignac number, because 56718881 - 2² = 56718877 is a prime.

It is a super-2 number, since 2×56718881² = 6434062923784322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56718821) 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, 9746 + ... + 14436.

It is an arithmetic number, because the mean of its divisors is an integer number (7220988).

Almost surely, 2^56718881 is an apocalyptic number.

It is an amenable number.

56718881 is a deficient number, since it is larger than the sum of its proper divisors (1049023).

56718881 is a wasteful number, since it uses less digits than its factorization.

56718881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4911.

The product of its digits is 107520, while the sum is 44.

The square root of 56718881 is about 7531.1938628613. The cubic root of 56718881 is about 384.2163878241.

The spelling of 56718881 in words is "fifty-six million, seven hundred eighteen thousand, eight hundred eighty-one".