57148581 has 16 divisors (see below), whose sum is σ = 87296000. Its totient is φ = 32576688.

The previous prime is 57148573. The next prime is 57148627. The reversal of 57148581 is 18584175.

It is not a de Polignac number, because 57148581 - 2³ = 57148573 is a prime.

It is a super-2 number, since 2×57148581² = 6531920620627122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57148501) 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, 6120 + ... + 12318.

It is an arithmetic number, because the mean of its divisors is an integer number (5456000).

Almost surely, 2^57148581 is an apocalyptic number.

It is an amenable number.

57148581 is a deficient number, since it is larger than the sum of its proper divisors (30147419).

57148581 is a wasteful number, since it uses less digits than its factorization.

57148581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6648.

The product of its digits is 44800, while the sum is 39.

The square root of 57148581 is about 7559.6680482677. The cubic root of 57148581 is about 385.1842172321.

The spelling of 57148581 in words is "fifty-seven million, one hundred forty-eight thousand, five hundred eighty-one".