57043561 has 2 divisors, whose sum is σ = 57043562. Its totient is φ = 57043560.

The previous prime is 57043537. The next prime is 57043573. The reversal of 57043561 is 16534075.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49617936 + 7425625 = 7044^2 + 2725^2 .

It is a cyclic number.

It is not a de Polignac number, because 57043561 - 2⁷ = 57043433 is a prime.

It is not a weakly prime, because it can be changed into another prime (57043531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28521780 + 28521781.

It is an arithmetic number, because the mean of its divisors is an integer number (28521781).

Almost surely, 2^57043561 is an apocalyptic number.

It is an amenable number.

57043561 is a deficient number, since it is larger than the sum of its proper divisors (1).

57043561 is an equidigital number, since it uses as much as digits as its factorization.

57043561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 57043561 is about 7552.7187820016. The cubic root of 57043561 is about 384.9481259170.

The spelling of 57043561 in words is "fifty-seven million, forty-three thousand, five hundred sixty-one".