56440831 has 4 divisors (see below), whose sum is σ = 56457000. Its totient is φ = 56424664.

The previous prime is 56440829. The next prime is 56440837. The reversal of 56440831 is 13804465.

It is a happy number.

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 56440831 - 2¹ = 56440829 is a prime.

It is a super-2 number, since 2×56440831² = 6371134807941122, 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 = 56440793 and 56440802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56440837) 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, 436 + ... + 10633.

It is an arithmetic number, because the mean of its divisors is an integer number (14114250).

Almost surely, 2^56440831 is an apocalyptic number.

56440831 is a deficient number, since it is larger than the sum of its proper divisors (16169).

56440831 is a wasteful number, since it uses less digits than its factorization.

56440831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16168.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 56440831 is about 7512.7112948655. The cubic root of 56440831 is about 383.5875177840.

The spelling of 56440831 in words is "fifty-six million, four hundred forty thousand, eight hundred thirty-one".