57995721 has 24 divisors (see below), whose sum is σ = 101372544. Its totient is φ = 31190400.

The previous prime is 57995701. The next prime is 57995723. The reversal of 57995721 is 12759975.

57995721 is a `hidden beast` number, since 5 + 79 + 9 + 572 + 1 = 666.

It is not a de Polignac number, because 57995721 - 2⁹ = 57995209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (57995723) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26005 + ... + 28146.

It is an arithmetic number, because the mean of its divisors is an integer number (4223856).

Almost surely, 2^57995721 is an apocalyptic number.

57995721 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

57995721 is a deficient number, since it is larger than the sum of its proper divisors (43376823).

57995721 is a wasteful number, since it uses less digits than its factorization.

57995721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54181 (or 54178 counting only the distinct ones).

The product of its digits is 198450, while the sum is 45.

The square root of 57995721 is about 7615.4921705691. The cubic root of 57995721 is about 387.0781445866.

The spelling of 57995721 in words is "fifty-seven million, nine hundred ninety-five thousand, seven hundred twenty-one".