57212537 has 4 divisors (see below), whose sum is σ = 57452160. Its totient is φ = 56972916.

The previous prime is 57212521. The next prime is 57212549. The reversal of 57212537 is 73521275.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 57212537 - 2⁴ = 57212521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57212557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119453 + ... + 119930.

It is an arithmetic number, because the mean of its divisors is an integer number (14363040).

Almost surely, 2^57212537 is an apocalyptic number.

It is an amenable number.

57212537 is a deficient number, since it is larger than the sum of its proper divisors (239623).

57212537 is a wasteful number, since it uses less digits than its factorization.

57212537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239622.

The product of its digits is 14700, while the sum is 32.

The square root of 57212537 is about 7563.8969453583. The cubic root of 57212537 is about 385.3278525147.

The spelling of 57212537 in words is "fifty-seven million, two hundred twelve thousand, five hundred thirty-seven".