57212816 has 20 divisors (see below), whose sum is σ = 111029724. Its totient is φ = 28560000.

The previous prime is 57212797. The next prime is 57212821. The reversal of 57212816 is 61821275.

It can be written as a sum of positive squares in 2 ways, for example, as 18524416 + 38688400 = 4304^2 + 6220^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8666 + ... + 13766.

Almost surely, 2^57212816 is an apocalyptic number.

It is an amenable number.

57212816 is a deficient number, since it is larger than the sum of its proper divisors (53816908).

57212816 is a wasteful number, since it uses less digits than its factorization.

57212816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5810 (or 5804 counting only the distinct ones).

The product of its digits is 6720, while the sum is 32.

The square root of 57212816 is about 7563.9153882100. The cubic root of 57212816 is about 385.3284788710.

The spelling of 57212816 in words is "fifty-seven million, two hundred twelve thousand, eight hundred sixteen".