56455931 has 4 divisors (see below), whose sum is σ = 64521072. Its totient is φ = 48390792.

The previous prime is 56455921. The next prime is 56455933. The reversal of 56455931 is 13955465.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13955465 = 5 ⋅2791093.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56455931 is a prime.

It is a super-2 number, since 2×56455931² = 6374544290153522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (56455933) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4032560 + ... + 4032573.

It is an arithmetic number, because the mean of its divisors is an integer number (16130268).

Almost surely, 2^56455931 is an apocalyptic number.

56455931 is a deficient number, since it is larger than the sum of its proper divisors (8065141).

56455931 is an equidigital number, since it uses as much as digits as its factorization.

56455931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8065140.

The product of its digits is 81000, while the sum is 38.

The square root of 56455931 is about 7513.7161910735. The cubic root of 56455931 is about 383.6217226611.

The spelling of 56455931 in words is "fifty-six million, four hundred fifty-five thousand, nine hundred thirty-one".