56515873 has 4 divisors (see below), whose sum is σ = 56637360. Its totient is φ = 56394388.

The previous prime is 56515859. The next prime is 56515897. The reversal of 56515873 is 37851565.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 56515873 - 2¹³ = 56507681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56515843) 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, 60043 + ... + 60976.

It is an arithmetic number, because the mean of its divisors is an integer number (14159340).

Almost surely, 2^56515873 is an apocalyptic number.

It is an amenable number.

56515873 is a deficient number, since it is larger than the sum of its proper divisors (121487).

56515873 is a wasteful number, since it uses less digits than its factorization.

56515873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121486.

The product of its digits is 126000, while the sum is 40.

The square root of 56515873 is about 7517.7039712934. The cubic root of 56515873 is about 383.7574445676.

The spelling of 56515873 in words is "fifty-six million, five hundred fifteen thousand, eight hundred seventy-three".