56156384231 has 4 divisors (see below), whose sum is σ = 56173399464. Its totient is φ = 56139369000.

The previous prime is 56156384191. The next prime is 56156384261. The reversal of 56156384231 is 13248365165.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56156384231 is a prime.

It is a super-2 number, since 2×56156384231² (a number of 22 digits) 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 (56156384261) 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, 8502665 + ... + 8509266.

It is an arithmetic number, because the mean of its divisors is an integer number (14043349866).

Almost surely, 2^56156384231 is an apocalyptic number.

56156384231 is a deficient number, since it is larger than the sum of its proper divisors (17015233).

56156384231 is a wasteful number, since it uses less digits than its factorization.

56156384231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17015232.

The product of its digits is 518400, while the sum is 44.

The spelling of 56156384231 in words is "fifty-six billion, one hundred fifty-six million, three hundred eighty-four thousand, two hundred thirty-one".