56031761 has 2 divisors, whose sum is σ = 56031762. Its totient is φ = 56031760.

The previous prime is 56031737. The next prime is 56031763. The reversal of 56031761 is 16713065.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50481025 + 5550736 = 7105^2 + 2356^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56031761 is a prime.

It is a super-2 number, since 2×56031761² = 6279116481522242, which contains 22 as substring.

Together with 56031763, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (56031763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28015880 + 28015881.

It is an arithmetic number, because the mean of its divisors is an integer number (28015881).

Almost surely, 2^56031761 is an apocalyptic number.

It is an amenable number.

56031761 is a deficient number, since it is larger than the sum of its proper divisors (1).

56031761 is an equidigital number, since it uses as much as digits as its factorization.

56031761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 56031761 is about 7485.4365938133. The cubic root of 56031761 is about 382.6585521791.

The spelling of 56031761 in words is "fifty-six million, thirty-one thousand, seven hundred sixty-one".