57358221 has 16 divisors (see below), whose sum is σ = 82954368. Its totient is φ = 35110400.

The previous prime is 57358199. The next prime is 57358237. The reversal of 57358221 is 12285375.

It is a cyclic number.

It is not a de Polignac number, because 57358221 - 2⁹ = 57357709 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57358261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11625 + ... + 15806.

It is an arithmetic number, because the mean of its divisors is an integer number (5184648).

Almost surely, 2^57358221 is an apocalyptic number.

57358221 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

57358221 is a deficient number, since it is larger than the sum of its proper divisors (25596147).

57358221 is a wasteful number, since it uses less digits than its factorization.

57358221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27492.

The product of its digits is 16800, while the sum is 33.

The square root of 57358221 is about 7573.5210437418. The cubic root of 57358221 is about 385.6546370822.

The spelling of 57358221 in words is "fifty-seven million, three hundred fifty-eight thousand, two hundred twenty-one".