57287279 has 4 divisors (see below), whose sum is σ = 65471184. Its totient is φ = 49103376.

The previous prime is 57287257. The next prime is 57287281. The reversal of 57287279 is 97278275.

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

It is not a de Polignac number, because 57287279 - 2⁸ = 57287023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57287249) 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, 4091942 + ... + 4091955.

It is an arithmetic number, because the mean of its divisors is an integer number (16367796).

Almost surely, 2^57287279 is an apocalyptic number.

57287279 is a deficient number, since it is larger than the sum of its proper divisors (8183905).

57287279 is an equidigital number, since it uses as much as digits as its factorization.

57287279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8183904.

The product of its digits is 493920, while the sum is 47.

The square root of 57287279 is about 7568.8360399734. The cubic root of 57287279 is about 385.4955759049.

The spelling of 57287279 in words is "fifty-seven million, two hundred eighty-seven thousand, two hundred seventy-nine".