57605221 has 4 divisors (see below), whose sum is σ = 58830912. Its totient is φ = 56379532.

The previous prime is 57605213. The next prime is 57605227. The reversal of 57605221 is 12250675.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 57605221 - 2³ = 57605213 is a prime.

It is a super-2 number, since 2×57605221² = 6636722972917682, 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 57605221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57605227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 612775 + ... + 612868.

It is an arithmetic number, because the mean of its divisors is an integer number (14707728).

Almost surely, 2^57605221 is an apocalyptic number.

It is an amenable number.

57605221 is a deficient number, since it is larger than the sum of its proper divisors (1225691).

57605221 is a wasteful number, since it uses less digits than its factorization.

57605221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1225690.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 57605221 is about 7589.8103401864. The cubic root of 57605221 is about 386.2074220547.

Adding to 57605221 its reverse (12250675), we get a palindrome (69855896).

The spelling of 57605221 in words is "fifty-seven million, six hundred five thousand, two hundred twenty-one".