57120537 has 4 divisors (see below), whose sum is σ = 76160720. Its totient is φ = 38080356.

The previous prime is 57120533. The next prime is 57120571. The reversal of 57120537 is 73502175.

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 not a de Polignac number, because 57120537 - 2² = 57120533 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57120533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9520087 + ... + 9520092.

It is an arithmetic number, because the mean of its divisors is an integer number (19040180).

Almost surely, 2^57120537 is an apocalyptic number.

It is an amenable number.

57120537 is a deficient number, since it is larger than the sum of its proper divisors (19040183).

57120537 is a wasteful number, since it uses less digits than its factorization.

57120537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19040182.

The product of its (nonzero) digits is 7350, while the sum is 30.

The square root of 57120537 is about 7557.8129773103. The cubic root of 57120537 is about 385.1212009482.

The spelling of 57120537 in words is "fifty-seven million, one hundred twenty thousand, five hundred thirty-seven".