57235491 has 12 divisors (see below), whose sum is σ = 85735832. Its totient is φ = 38156832.

The previous prime is 57235483. The next prime is 57235511. The reversal of 57235491 is 19453275.

It is not a de Polignac number, because 57235491 - 2³ = 57235483 is a prime.

It is a super-2 number, since 2×57235491² = 6551802860022162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57235441) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 117526 + ... + 118011.

Almost surely, 2^57235491 is an apocalyptic number.

57235491 is a deficient number, since it is larger than the sum of its proper divisors (28500341).

57235491 is an equidigital number, since it uses as much as digits as its factorization.

57235491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235552 (or 235540 counting only the distinct ones).

The product of its digits is 37800, while the sum is 36.

The square root of 57235491 is about 7565.4141327491. The cubic root of 57235491 is about 385.3793775439.

It can be divided in two parts, 572 and 35491, that added together give a palindrome (36063).

The spelling of 57235491 in words is "fifty-seven million, two hundred thirty-five thousand, four hundred ninety-one".