57524221 has 4 divisors (see below), whose sum is σ = 57640000. Its totient is φ = 57408444.

The previous prime is 57524213. The next prime is 57524227. The reversal of 57524221 is 12242575.

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 57524221 - 2³ = 57524213 is a prime.

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 57524221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57524227) 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, 57141 + ... + 58138.

It is an arithmetic number, because the mean of its divisors is an integer number (14410000).

Almost surely, 2^57524221 is an apocalyptic number.

It is an amenable number.

57524221 is a deficient number, since it is larger than the sum of its proper divisors (115779).

57524221 is a wasteful number, since it uses less digits than its factorization.

57524221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115778.

The product of its digits is 5600, while the sum is 28.

The square root of 57524221 is about 7584.4723613446. The cubic root of 57524221 is about 386.0263188226.

Adding to 57524221 its reverse (12242575), we get a palindrome (69766796).

The spelling of 57524221 in words is "fifty-seven million, five hundred twenty-four thousand, two hundred twenty-one".