57216512 has 20 divisors (see below), whose sum is σ = 114322296. Its totient is φ = 28608000.

The previous prime is 57216503. The next prime is 57216527. The reversal of 57216512 is 21561275.

It is a super-2 number, since 2×57216512² = 6547458490892288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55364 + ... + 56387.

Almost surely, 2^57216512 is an apocalyptic number.

It is an amenable number.

57216512 is a deficient number, since it is larger than the sum of its proper divisors (57105784).

57216512 is an equidigital number, since it uses as much as digits as its factorization.

57216512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111769 (or 111753 counting only the distinct ones).

The product of its digits is 4200, while the sum is 29.

The square root of 57216512 is about 7564.1597021745. The cubic root of 57216512 is about 385.3367762158.

Adding to 57216512 its reverse (21561275), we get a palindrome (78777787).

The spelling of 57216512 in words is "fifty-seven million, two hundred sixteen thousand, five hundred twelve".