57431091 has 16 divisors (see below), whose sum is σ = 80864000. Its totient is φ = 36155808.

The previous prime is 57431029. The next prime is 57431093. The reversal of 57431091 is 19013475.

57431091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 57431091 - 2¹⁰ = 57430067 is a prime.

It is not an unprimeable number, because it can be changed into a prime (57431093) 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 in 15 ways as a sum of consecutive naturals, for example, 18450 + ... + 21336.

It is an arithmetic number, because the mean of its divisors is an integer number (5054000).

Almost surely, 2^57431091 is an apocalyptic number.

57431091 is a deficient number, since it is larger than the sum of its proper divisors (23432909).

57431091 is a wasteful number, since it uses less digits than its factorization.

57431091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3258.

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 57431091 is about 7578.3303570114. The cubic root of 57431091 is about 385.8178845960.

The spelling of 57431091 in words is "fifty-seven million, four hundred thirty-one thousand, ninety-one".