56831 has 4 divisors (see below), whose sum is σ = 60192. Its totient is φ = 53472.

The previous prime is 56827. The next prime is 56843. The reversal of 56831 is 13865.

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 56831 - 2² = 56827 is a prime.

It is a super-2 number, since 2×56831² = 6459525122, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 8 and base 16.

It is a zygodrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 56797 and 56806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56821) 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, 1655 + ... + 1688.

It is an arithmetic number, because the mean of its divisors is an integer number (15048).

2⁵⁶⁸³¹ is an apocalyptic number.

56831 is a deficient number, since it is larger than the sum of its proper divisors (3361).

56831 is a wasteful number, since it uses less digits than its factorization.

56831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3360.

The product of its digits is 720, while the sum is 23.

The square root of 56831 is about 238.3925334401. The cubic root of 56831 is about 38.4469387665.

The spelling of 56831 in words is "fifty-six thousand, eight hundred thirty-one".