57577221 has 12 divisors (see below), whose sum is σ = 89564748. Its totient is φ = 35432064.

The previous prime is 57577213. The next prime is 57577231. The reversal of 57577221 is 12277575.

It can be written as a sum of positive squares in 2 ways, for example, as 28836900 + 28740321 = 5370^2 + 5361^2 .

It is not a de Polignac number, because 57577221 - 2³ = 57577213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57577231) 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, 245940 + ... + 246173.

It is an arithmetic number, because the mean of its divisors is an integer number (7463729).

Almost surely, 2^57577221 is an apocalyptic number.

It is an amenable number.

57577221 is a deficient number, since it is larger than the sum of its proper divisors (31987527).

57577221 is a wasteful number, since it uses less digits than its factorization.

57577221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492132 (or 492129 counting only the distinct ones).

The product of its digits is 34300, while the sum is 36.

The square root of 57577221 is about 7587.9655376128. The cubic root of 57577221 is about 386.1448376791.

The spelling of 57577221 in words is "fifty-seven million, five hundred seventy-seven thousand, two hundred twenty-one".