57997521 has 6 divisors (see below), whose sum is σ = 83774210. Its totient is φ = 38665008.

The previous prime is 57997517. The next prime is 57997573. The reversal of 57997521 is 12579975.

57997521 is a `hidden beast` number, since 579 + 9 + 75 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 45037521 + 12960000 = 6711^2 + 3600^2 .

It is not a de Polignac number, because 57997521 - 2² = 57997517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57997021) 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, 3222076 + ... + 3222093.

Almost surely, 2^57997521 is an apocalyptic number.

It is an amenable number.

57997521 is a deficient number, since it is larger than the sum of its proper divisors (25776689).

57997521 is a wasteful number, since it uses less digits than its factorization.

57997521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6444175 (or 6444172 counting only the distinct ones).

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

The square root of 57997521 is about 7615.6103498013. The cubic root of 57997521 is about 387.0821490973.

It can be divided in two parts, 57 and 997521, that added together give a triangular number (997578 = T₁₄₁₂).

The spelling of 57997521 in words is "fifty-seven million, nine hundred ninety-seven thousand, five hundred twenty-one".