56396881 has 2 divisors, whose sum is σ = 56396882. Its totient is φ = 56396880.

The previous prime is 56396849. The next prime is 56396891. The reversal of 56396881 is 18869365.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53523856 + 2873025 = 7316^2 + 1695^2 .

It is a cyclic number.

It is not a de Polignac number, because 56396881 - 2⁵ = 56396849 is a prime.

It is a super-2 number, since 2×56396881² = 6361216373056322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (56396801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28198440 + 28198441.

It is an arithmetic number, because the mean of its divisors is an integer number (28198441).

Almost surely, 2^56396881 is an apocalyptic number.

It is an amenable number.

56396881 is a deficient number, since it is larger than the sum of its proper divisors (1).

56396881 is an equidigital number, since it uses as much as digits as its factorization.

56396881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 311040, while the sum is 46.

The square root of 56396881 is about 7509.7856826943. The cubic root of 56396881 is about 383.4879264722.

The spelling of 56396881 in words is "fifty-six million, three hundred ninety-six thousand, eight hundred eighty-one".