57130287 has 4 divisors (see below), whose sum is σ = 76173720. Its totient is φ = 38086856.

The previous prime is 57130267. The next prime is 57130291. The reversal of 57130287 is 78203175.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 57130287 - 2¹⁵ = 57097519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57130247) 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, 9521712 + ... + 9521717.

It is an arithmetic number, because the mean of its divisors is an integer number (19043430).

Almost surely, 2^57130287 is an apocalyptic number.

57130287 is a deficient number, since it is larger than the sum of its proper divisors (19043433).

57130287 is a wasteful number, since it uses less digits than its factorization.

57130287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19043432.

The product of its (nonzero) digits is 11760, while the sum is 33.

The square root of 57130287 is about 7558.4579776566. The cubic root of 57130287 is about 385.1431120289.

The spelling of 57130287 in words is "fifty-seven million, one hundred thirty thousand, two hundred eighty-seven".