57696021 has 6 divisors (see below), whose sum is σ = 83338710. Its totient is φ = 38464008.

The previous prime is 57696017. The next prime is 57696047. The reversal of 57696021 is 12069675.

57696021 is a `hidden beast` number, since 576 + 9 + 60 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 43362225 + 14333796 = 6585^2 + 3786^2 .

It is not a de Polignac number, because 57696021 - 2² = 57696017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57696071) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3205326 + ... + 3205343.

It is an arithmetic number, because the mean of its divisors is an integer number (13889785).

Almost surely, 2^57696021 is an apocalyptic number.

It is an amenable number.

57696021 is a deficient number, since it is larger than the sum of its proper divisors (25642689).

57696021 is a wasteful number, since it uses less digits than its factorization.

57696021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6410675 (or 6410672 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 57696021 is about 7595.7896890317. The cubic root of 57696021 is about 386.4102348343.

The spelling of 57696021 in words is "fifty-seven million, six hundred ninety-six thousand, twenty-one".