57721323 has 16 divisors (see below), whose sum is σ = 84329856. Its totient is φ = 34827840.

The previous prime is 57721309. The next prime is 57721331. The reversal of 57721323 is 32312775.

It is not a de Polignac number, because 57721323 - 2⁵ = 57721291 is a prime.

It is a super-2 number, since 2×57721323² = 6663502257740658, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (57721423) 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, 3936 + ... + 11442.

It is an arithmetic number, because the mean of its divisors is an integer number (5270616).

Almost surely, 2^57721323 is an apocalyptic number.

57721323 is a deficient number, since it is larger than the sum of its proper divisors (26608533).

57721323 is a wasteful number, since it uses less digits than its factorization.

57721323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7754.

The product of its digits is 8820, while the sum is 30.

The square root of 57721323 is about 7597.4550344178. The cubic root of 57721323 is about 386.4667119983.

The spelling of 57721323 in words is "fifty-seven million, seven hundred twenty-one thousand, three hundred twenty-three".