56397431 has 8 divisors (see below), whose sum is σ = 59000400. Its totient is φ = 53838400.

The previous prime is 56397413. The next prime is 56397437. The reversal of 56397431 is 13479365.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56397431 is a prime.

It is a super-2 number, since 2×56397431² = 6361340446799522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56397437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8345 + ... + 13506.

It is an arithmetic number, because the mean of its divisors is an integer number (7375050).

Almost surely, 2^56397431 is an apocalyptic number.

56397431 is a deficient number, since it is larger than the sum of its proper divisors (2602969).

56397431 is a wasteful number, since it uses less digits than its factorization.

56397431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21969.

The product of its digits is 68040, while the sum is 38.

The square root of 56397431 is about 7509.8223014929. The cubic root of 56397431 is about 383.4891730995.

The spelling of 56397431 in words is "fifty-six million, three hundred ninety-seven thousand, four hundred thirty-one".