56113831 has 2 divisors, whose sum is σ = 56113832. Its totient is φ = 56113830.

The previous prime is 56113777. The next prime is 56113843. The reversal of 56113831 is 13831165.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56113831 - 2²¹ = 54016679 is a prime.

It is a super-4 number, since 4×56113831⁴ (a number of 32 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56113831.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56113861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28056915 + 28056916.

It is an arithmetic number, because the mean of its divisors is an integer number (28056916).

Almost surely, 2^56113831 is an apocalyptic number.

56113831 is a deficient number, since it is larger than the sum of its proper divisors (1).

56113831 is an equidigital number, since it uses as much as digits as its factorization.

56113831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 28.

The square root of 56113831 is about 7490.9165660819. The cubic root of 56113831 is about 382.8452883347.

Adding to 56113831 its reverse (13831165), we get a palindrome (69944996).

The spelling of 56113831 in words is "fifty-six million, one hundred thirteen thousand, eight hundred thirty-one".