513681216 has 28 divisors (see below), whose sum is σ = 1359115392. Its totient is φ = 171227008.

The previous prime is 513681209. The next prime is 513681271. The reversal of 513681216 is 612186315.

It is a congruent number.

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, 1337520 + ... + 1337903.

Almost surely, 2^513681216 is an apocalyptic number.

It is an amenable number.

513681216 is an abundant number, since it is smaller than the sum of its proper divisors (845434176).

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

513681216 is a wasteful number, since it uses less digits than its factorization.

513681216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2675438 (or 2675428 counting only the distinct ones).

The product of its digits is 8640, while the sum is 33.

The square root of 513681216 is about 22664.5365273592. The cubic root of 513681216 is about 800.8746766607.

The spelling of 513681216 in words is "five hundred thirteen million, six hundred eighty-one thousand, two hundred sixteen".