56100581 has 2 divisors, whose sum is σ = 56100582. Its totient is φ = 56100580.

The previous prime is 56100557. The next prime is 56100593. The reversal of 56100581 is 18500165.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48427681 + 7672900 = 6959^2 + 2770^2 .

It is a cyclic number.

It is not a de Polignac number, because 56100581 - 2¹⁰ = 56099557 is a prime.

It is a super-2 number, since 2×56100581² = 6294550377075122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 56100581.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56100511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28050290 + 28050291.

It is an arithmetic number, because the mean of its divisors is an integer number (28050291).

Almost surely, 2^56100581 is an apocalyptic number.

It is an amenable number.

56100581 is a deficient number, since it is larger than the sum of its proper divisors (1).

56100581 is an equidigital number, since it uses as much as digits as its factorization.

56100581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 26.

The square root of 56100581 is about 7490.0321094105. The cubic root of 56100581 is about 382.8151525714.

The spelling of 56100581 in words is "fifty-six million, one hundred thousand, five hundred eighty-one".