57308561 has 2 divisors, whose sum is σ = 57308562. Its totient is φ = 57308560.

The previous prime is 57308543. The next prime is 57308569. The reversal of 57308561 is 16580375.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32706961 + 24601600 = 5719^2 + 4960^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57308561 is a prime.

It is not a weakly prime, because it can be changed into another prime (57308569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28654280 + 28654281.

It is an arithmetic number, because the mean of its divisors is an integer number (28654281).

Almost surely, 2^57308561 is an apocalyptic number.

It is an amenable number.

57308561 is a deficient number, since it is larger than the sum of its proper divisors (1).

57308561 is an equidigital number, since it uses as much as digits as its factorization.

57308561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 57308561 is about 7570.2418059135. The cubic root of 57308561 is about 385.5433066942.

The spelling of 57308561 in words is "fifty-seven million, three hundred eight thousand, five hundred sixty-one".