57213838 has 16 divisors (see below), whose sum is σ = 93912624. Its totient is φ = 25925760.

The previous prime is 57213833. The next prime is 57213851. The reversal of 57213838 is 83831275.

It is a junction number, because it is equal to n+sod(n) for n = 57213797 and 57213806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57213833) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3556 + ... + 11272.

It is an arithmetic number, because the mean of its divisors is an integer number (5869539).

Almost surely, 2^57213838 is an apocalyptic number.

57213838 is a deficient number, since it is larger than the sum of its proper divisors (36698786).

57213838 is a wasteful number, since it uses less digits than its factorization.

57213838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8067.

The product of its digits is 40320, while the sum is 37.

The square root of 57213838 is about 7563.9829455122. The cubic root of 57213838 is about 385.3307732483.

It can be divided in two parts, 5721 and 3838, that added together give a palindrome (9559).

The spelling of 57213838 in words is "fifty-seven million, two hundred thirteen thousand, eight hundred thirty-eight".