57087247 has 4 divisors (see below), whose sum is σ = 65242576. Its totient is φ = 48931920.

The previous prime is 57087227. The next prime is 57087253. The reversal of 57087247 is 74278075.

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 57087247 - 2¹¹ = 57085199 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57087227) 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, 4077654 + ... + 4077667.

It is an arithmetic number, because the mean of its divisors is an integer number (16310644).

Almost surely, 2^57087247 is an apocalyptic number.

57087247 is a deficient number, since it is larger than the sum of its proper divisors (8155329).

57087247 is an equidigital number, since it uses as much as digits as its factorization.

57087247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8155328.

The product of its (nonzero) digits is 109760, while the sum is 40.

The square root of 57087247 is about 7555.6102996383. The cubic root of 57087247 is about 385.0463698577.

The spelling of 57087247 in words is "fifty-seven million, eighty-seven thousand, two hundred forty-seven".