56117569 has 2 divisors, whose sum is σ = 56117570. Its totient is φ = 56117568.

The previous prime is 56117563. The next prime is 56117587. The reversal of 56117569 is 96571165.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47444544 + 8673025 = 6888^2 + 2945^2 .

It is a cyclic number.

It is not a de Polignac number, because 56117569 - 2¹⁵ = 56084801 is a prime.

It is a super-2 number, since 2×56117569² = 6298363100939522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (56117563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28058784 + 28058785.

It is an arithmetic number, because the mean of its divisors is an integer number (28058785).

Almost surely, 2^56117569 is an apocalyptic number.

It is an amenable number.

56117569 is a deficient number, since it is larger than the sum of its proper divisors (1).

56117569 is an equidigital number, since it uses as much as digits as its factorization.

56117569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56700, while the sum is 40.

The square root of 56117569 is about 7491.1660641051. The cubic root of 56117569 is about 382.8537891736.

The spelling of 56117569 in words is "fifty-six million, one hundred seventeen thousand, five hundred sixty-nine".