57212538 has 8 divisors (see below), whose sum is σ = 114425088. Its totient is φ = 19070844.

The previous prime is 57212521. The next prime is 57212549. The reversal of 57212538 is 83521275.

It is a sphenic number, since it is the product of 3 distinct primes.

57212538 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 57212499 and 57212508.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4767706 + ... + 4767717.

It is an arithmetic number, because the mean of its divisors is an integer number (14303136).

Almost surely, 2^57212538 is an apocalyptic number.

57212538 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

57212538 is a wasteful number, since it uses less digits than its factorization.

57212538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9535428.

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

The square root of 57212538 is about 7563.8970114618. The cubic root of 57212538 is about 385.3278547597.

The spelling of 57212538 in words is "fifty-seven million, two hundred twelve thousand, five hundred thirty-eight".