57161911 has 2 divisors, whose sum is σ = 57161912. Its totient is φ = 57161910.

The previous prime is 57161891. The next prime is 57161933. The reversal of 57161911 is 11916175.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 57161911 - 2⁵ = 57161879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57161311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28580955 + 28580956.

It is an arithmetic number, because the mean of its divisors is an integer number (28580956).

Almost surely, 2^57161911 is an apocalyptic number.

57161911 is a deficient number, since it is larger than the sum of its proper divisors (1).

57161911 is an equidigital number, since it uses as much as digits as its factorization.

57161911 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1890, while the sum is 31.

The square root of 57161911 is about 7560.5496493311. The cubic root of 57161911 is about 385.2141631868.

The spelling of 57161911 in words is "fifty-seven million, one hundred sixty-one thousand, nine hundred eleven".