57339821 has 24 divisors (see below), whose sum is σ = 73192512. Its totient is φ = 43632000.

The previous prime is 57339811. The next prime is 57339823. The reversal of 57339821 is 12893375.

57339821 is nontrivially palindromic in base 6.

It is not a de Polignac number, because 57339821 - 2¹⁰ = 57338797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57339823) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 567671 + ... + 567771.

It is an arithmetic number, because the mean of its divisors is an integer number (3049688).

Almost surely, 2^57339821 is an apocalyptic number.

It is an amenable number.

57339821 is a deficient number, since it is larger than the sum of its proper divisors (15852691).

57339821 is a wasteful number, since it uses less digits than its factorization.

57339821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293 (or 192 counting only the distinct ones).

The product of its digits is 45360, while the sum is 38.

The square root of 57339821 is about 7572.3061876815. The cubic root of 57339821 is about 385.6133944953.

The spelling of 57339821 in words is "fifty-seven million, three hundred thirty-nine thousand, eight hundred twenty-one".