56522581 has 2 divisors, whose sum is σ = 56522582. Its totient is φ = 56522580.

The previous prime is 56522563. The next prime is 56522593. The reversal of 56522581 is 18522565.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34751025 + 21771556 = 5895^2 + 4666^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56522581 is a prime.

It is a super-2 number, since 2×56522581² = 6389604325803122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56522551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28261290 + 28261291.

It is an arithmetic number, because the mean of its divisors is an integer number (28261291).

Almost surely, 2^56522581 is an apocalyptic number.

It is an amenable number.

56522581 is a deficient number, since it is larger than the sum of its proper divisors (1).

56522581 is an equidigital number, since it uses as much as digits as its factorization.

56522581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24000, while the sum is 34.

The square root of 56522581 is about 7518.1501049128. The cubic root of 56522581 is about 383.7726269873.

The spelling of 56522581 in words is "fifty-six million, five hundred twenty-two thousand, five hundred eighty-one".