57358821 has 16 divisors (see below), whose sum is σ = 82603136. Its totient is φ = 35194176.

The previous prime is 57358817. The next prime is 57358831. The reversal of 57358821 is 12885375.

It is not a de Polignac number, because 57358821 - 2² = 57358817 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (39).

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 57358821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57358811) 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, 12576 + ... + 16518.

It is an arithmetic number, because the mean of its divisors is an integer number (5162696).

Almost surely, 2^57358821 is an apocalyptic number.

It is an amenable number.

57358821 is a deficient number, since it is larger than the sum of its proper divisors (25244315).

57358821 is a wasteful number, since it uses less digits than its factorization.

57358821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4332.

The product of its digits is 67200, while the sum is 39.

The square root of 57358821 is about 7573.5606553325. The cubic root of 57358821 is about 385.6559818007.

The spelling of 57358821 in words is "fifty-seven million, three hundred fifty-eight thousand, eight hundred twenty-one".