56723831 has 4 divisors (see below), whose sum is σ = 58553664. Its totient is φ = 54894000.

The previous prime is 56723827. The next prime is 56723857. The reversal of 56723831 is 13832765.

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

It is a cyclic number.

It is not a de Polignac number, because 56723831 - 2² = 56723827 is a prime.

It is a super-2 number, since 2×56723831² = 6435186006633122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56723791 and 56723800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56723861) 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, 914870 + ... + 914931.

It is an arithmetic number, because the mean of its divisors is an integer number (14638416).

Almost surely, 2^56723831 is an apocalyptic number.

56723831 is a deficient number, since it is larger than the sum of its proper divisors (1829833).

56723831 is a wasteful number, since it uses less digits than its factorization.

56723831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1829832.

The product of its digits is 30240, while the sum is 35.

The square root of 56723831 is about 7531.5224888465. The cubic root of 56723831 is about 384.2275646772.

The spelling of 56723831 in words is "fifty-six million, seven hundred twenty-three thousand, eight hundred thirty-one".