57218671 has 8 divisors (see below), whose sum is σ = 61218800. Its totient is φ = 53317440.

The previous prime is 57218659. The next prime is 57218677. The reversal of 57218671 is 17681275.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 57218671 - 2⁹ = 57218159 is a prime.

It is a super-2 number, since 2×57218671² = 6547952622012482, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 57218671.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57218677) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23526 + ... + 25843.

It is an arithmetic number, because the mean of its divisors is an integer number (7652350).

Almost surely, 2^57218671 is an apocalyptic number.

57218671 is a deficient number, since it is larger than the sum of its proper divisors (4000129).

57218671 is a wasteful number, since it uses less digits than its factorization.

57218671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49449.

The product of its digits is 23520, while the sum is 37.

The square root of 57218671 is about 7564.3024133095. The cubic root of 57218671 is about 385.3416229032.

The spelling of 57218671 in words is "fifty-seven million, two hundred eighteen thousand, six hundred seventy-one".