57679221 has 12 divisors (see below), whose sum is σ = 78202176. Its totient is φ = 37815120.

The previous prime is 57679213. The next prime is 57679229. The reversal of 57679221 is 12297675.

It is an interprime number because it is at equal distance from previous prime (57679213) and next prime (57679229).

It is not a de Polignac number, because 57679221 - 2³ = 57679213 is a prime.

57679221 is a Rhonda number in base 10.

Its product of digits (52920) is a multiple of the sum of its prime factors (5292).

It is a self number, because there is not a number n which added to its sum of digits gives 57679221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57679229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8580 + ... + 13746.

It is an arithmetic number, because the mean of its divisors is an integer number (6516848).

Almost surely, 2^57679221 is an apocalyptic number.

It is an amenable number.

57679221 is a deficient number, since it is larger than the sum of its proper divisors (20522955).

57679221 is an equidigital number, since it uses as much as digits as its factorization.

57679221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5292 (or 5231 counting only the distinct ones).

The product of its digits is 52920, while the sum is 39.

The square root of 57679221 is about 7594.6837327172. The cubic root of 57679221 is about 386.3727260540.

It can be divided in two parts, 576 and 79221, that added together give a palindrome (79797).

The spelling of 57679221 in words is "fifty-seven million, six hundred seventy-nine thousand, two hundred twenty-one".