57228591 has 16 divisors (see below), whose sum is σ = 87375104. Its totient is φ = 32638464.

The previous prime is 57228581. The next prime is 57228593. The reversal of 57228591 is 19582275.

It is not a de Polignac number, because 57228591 - 2⁶ = 57228527 is a prime.

It is a super-2 number, since 2×57228591² = 6550223255690562, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57228593) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9756 + ... + 14478.

It is an arithmetic number, because the mean of its divisors is an integer number (5460944).

Almost surely, 2^57228591 is an apocalyptic number.

57228591 is a deficient number, since it is larger than the sum of its proper divisors (30146513).

57228591 is a wasteful number, since it uses less digits than its factorization.

57228591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5310.

The product of its digits is 50400, while the sum is 39.

The square root of 57228591 is about 7564.9580963810. The cubic root of 57228591 is about 385.3638905065.

The spelling of 57228591 in words is "fifty-seven million, two hundred twenty-eight thousand, five hundred ninety-one".