56113891 has 4 divisors (see below), whose sum is σ = 56458312. Its totient is φ = 55769472.

The previous prime is 56113873. The next prime is 56113913. The reversal of 56113891 is 19831165.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-56113891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56113831) 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, 171966 + ... + 172291.

It is an arithmetic number, because the mean of its divisors is an integer number (14114578).

Almost surely, 2^56113891 is an apocalyptic number.

56113891 is a deficient number, since it is larger than the sum of its proper divisors (344421).

56113891 is a wasteful number, since it uses less digits than its factorization.

56113891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344420.

The product of its digits is 6480, while the sum is 34.

The square root of 56113891 is about 7490.9205709312. The cubic root of 56113891 is about 382.8454247877.

The spelling of 56113891 in words is "fifty-six million, one hundred thirteen thousand, eight hundred ninety-one".