57156569 has 2 divisors, whose sum is σ = 57156570. Its totient is φ = 57156568.

The previous prime is 57156563. The next prime is 57156613. The reversal of 57156569 is 96565175.

57156569 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (57156613) can be obtained adding 57156569 to its sum of digits (44).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33779344 + 23377225 = 5812^2 + 4835^2 .

It is a cyclic number.

It is not a de Polignac number, because 57156569 - 2⁴ = 57156553 is a prime.

It is a super-2 number, since 2×57156569² = 6533746759703522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (57156563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28578284 + 28578285.

It is an arithmetic number, because the mean of its divisors is an integer number (28578285).

Almost surely, 2^57156569 is an apocalyptic number.

It is an amenable number.

57156569 is a deficient number, since it is larger than the sum of its proper divisors (1).

57156569 is an equidigital number, since it uses as much as digits as its factorization.

57156569 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 283500, while the sum is 44.

The square root of 57156569 is about 7560.1963598838. The cubic root of 57156569 is about 385.2021628989.

The spelling of 57156569 in words is "fifty-seven million, one hundred fifty-six thousand, five hundred sixty-nine".