56885581 has 2 divisors, whose sum is σ = 56885582. Its totient is φ = 56885580.

The previous prime is 56885537. The next prime is 56885593. The reversal of 56885581 is 18558865.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41409225 + 15476356 = 6435^2 + 3934^2 .

It is a cyclic number.

It is not a de Polignac number, because 56885581 - 2⁷ = 56885453 is a prime.

It is a super-2 number, since 2×56885581² = 6471938651415122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56885531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28442790 + 28442791.

It is an arithmetic number, because the mean of its divisors is an integer number (28442791).

Almost surely, 2^56885581 is an apocalyptic number.

It is an amenable number.

56885581 is a deficient number, since it is larger than the sum of its proper divisors (1).

56885581 is an equidigital number, since it uses as much as digits as its factorization.

56885581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 384000, while the sum is 46.

The square root of 56885581 is about 7542.2530453439. The cubic root of 56885581 is about 384.5924308937.

The spelling of 56885581 in words is "fifty-six million, eight hundred eighty-five thousand, five hundred eighty-one".