56965561 has 2 divisors, whose sum is σ = 56965562. Its totient is φ = 56965560.

The previous prime is 56965547. The next prime is 56965567. The reversal of 56965561 is 16556965.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55875625 + 1089936 = 7475^2 + 1044^2 .

It is a cyclic number.

It is not a de Polignac number, because 56965561 - 2⁵ = 56965529 is a prime.

It is not a weakly prime, because it can be changed into another prime (56965567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28482780 + 28482781.

It is an arithmetic number, because the mean of its divisors is an integer number (28482781).

Almost surely, 2^56965561 is an apocalyptic number.

It is an amenable number.

56965561 is a deficient number, since it is larger than the sum of its proper divisors (1).

56965561 is an equidigital number, since it uses as much as digits as its factorization.

56965561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 243000, while the sum is 43.

The square root of 56965561 is about 7547.5533121668. The cubic root of 56965561 is about 384.7725896000.

The spelling of 56965561 in words is "fifty-six million, nine hundred sixty-five thousand, five hundred sixty-one".