56456881 has 32 divisors (see below), whose sum is σ = 69672960. Its totient is φ = 45179904.

The previous prime is 56456867. The next prime is 56456891. The reversal of 56456881 is 18865465.

It is a cyclic number.

It is not a de Polignac number, because 56456881 - 2¹⁵ = 56424113 is a prime.

It is a super-2 number, since 2×56456881² = 6374758824496322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56456801) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 147216 + ... + 147598.

It is an arithmetic number, because the mean of its divisors is an integer number (2177280).

Almost surely, 2^56456881 is an apocalyptic number.

It is an amenable number.

56456881 is a deficient number, since it is larger than the sum of its proper divisors (13216079).

56456881 is a wasteful number, since it uses less digits than its factorization.

56456881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465.

The product of its digits is 230400, while the sum is 43.

The square root of 56456881 is about 7513.7794085267. The cubic root of 56456881 is about 383.6238744196.

The spelling of 56456881 in words is "fifty-six million, four hundred fifty-six thousand, eight hundred eighty-one".