56534581 has 2 divisors, whose sum is σ = 56534582. Its totient is φ = 56534580.

The previous prime is 56534563. The next prime is 56534587. The reversal of 56534581 is 18543565.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50893956 + 5640625 = 7134^2 + 2375^2 .

It is a cyclic number.

It is not a de Polignac number, because 56534581 - 2⁵ = 56534549 is a prime.

It is a super-2 number, since 2×56534581² = 6392317697691122, which contains 22 as substring.

It is equal to p_3368269 and since 56534581 and 3368269 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56534581.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56534587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28267290 + 28267291.

It is an arithmetic number, because the mean of its divisors is an integer number (28267291).

Almost surely, 2^56534581 is an apocalyptic number.

It is an amenable number.

56534581 is a deficient number, since it is larger than the sum of its proper divisors (1).

56534581 is an equidigital number, since it uses as much as digits as its factorization.

56534581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72000, while the sum is 37.

The square root of 56534581 is about 7518.9481312215. The cubic root of 56534581 is about 383.7997839546.

The spelling of 56534581 in words is "fifty-six million, five hundred thirty-four thousand, five hundred eighty-one".