57261161 has 2 divisors, whose sum is σ = 57261162. Its totient is φ = 57261160.

The previous prime is 57261143. The next prime is 57261173. The reversal of 57261161 is 16116275.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40704400 + 16556761 = 6380^2 + 4069^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57261161 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (57261101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28630580 + 28630581.

It is an arithmetic number, because the mean of its divisors is an integer number (28630581).

Almost surely, 2^57261161 is an apocalyptic number.

It is an amenable number.

57261161 is a deficient number, since it is larger than the sum of its proper divisors (1).

57261161 is an equidigital number, since it uses as much as digits as its factorization.

57261161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2520, while the sum is 29.

The square root of 57261161 is about 7567.1104789080. The cubic root of 57261161 is about 385.4369828856.

The spelling of 57261161 in words is "fifty-seven million, two hundred sixty-one thousand, one hundred sixty-one".