57194921 has 16 divisors (see below), whose sum is σ = 69029760. Its totient is φ = 46293120.

The previous prime is 57194909. The next prime is 57194923. The reversal of 57194921 is 12949175.

It is a de Polignac number, because none of the positive numbers 2^k-57194921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57194923) 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, 60311 + ... + 61251.

It is an arithmetic number, because the mean of its divisors is an integer number (4314360).

Almost surely, 2^57194921 is an apocalyptic number.

It is an amenable number.

57194921 is a deficient number, since it is larger than the sum of its proper divisors (11834839).

57194921 is a wasteful number, since it uses less digits than its factorization.

57194921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1424.

The product of its digits is 22680, while the sum is 38.

The square root of 57194921 is about 7562.7323765951. The cubic root of 57194921 is about 385.2883003897.

The spelling of 57194921 in words is "fifty-seven million, one hundred ninety-four thousand, nine hundred twenty-one".