56216854231 has 2 divisors, whose sum is σ = 56216854232. Its totient is φ = 56216854230.

The previous prime is 56216854159. The next prime is 56216854247. The reversal of 56216854231 is 13245861265.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56216854231 is a prime.

It is a super-2 number, since 2×56216854231² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56216854261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28108427115 + 28108427116.

It is an arithmetic number, because the mean of its divisors is an integer number (28108427116).

Almost surely, 2^56216854231 is an apocalyptic number.

56216854231 is a deficient number, since it is larger than the sum of its proper divisors (1).

56216854231 is an equidigital number, since it uses as much as digits as its factorization.

56216854231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 345600, while the sum is 43.

The spelling of 56216854231 in words is "fifty-six billion, two hundred sixteen million, eight hundred fifty-four thousand, two hundred thirty-one".