57215479 has 4 divisors (see below), whose sum is σ = 60226840. Its totient is φ = 54204120.

The previous prime is 57215453. The next prime is 57215503. The reversal of 57215479 is 97451275.

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 57215479 - 2⁷ = 57215351 is a prime.

It is a super-2 number, since 2×57215479² = 6547222074398882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57215449) 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, 1505652 + ... + 1505689.

It is an arithmetic number, because the mean of its divisors is an integer number (15056710).

Almost surely, 2^57215479 is an apocalyptic number.

57215479 is a deficient number, since it is larger than the sum of its proper divisors (3011361).

57215479 is a wasteful number, since it uses less digits than its factorization.

57215479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3011360.

The product of its digits is 88200, while the sum is 40.

The square root of 57215479 is about 7564.0914193312. The cubic root of 57215479 is about 385.3344572157.

The spelling of 57215479 in words is "fifty-seven million, two hundred fifteen thousand, four hundred seventy-nine".