513518913 has 8 divisors (see below), whose sum is σ = 760768800. Its totient is φ = 342345924.

The previous prime is 513518899. The next prime is 513518939. The reversal of 513518913 is 319815315.

513518913 is a `hidden beast` number, since 51 + 3 + 518 + 91 + 3 = 666.

It is not a de Polignac number, because 513518913 - 2¹⁸ = 513256769 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (513510913) 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, 9509583 + ... + 9509636.

It is an arithmetic number, because the mean of its divisors is an integer number (95096100).

Almost surely, 2^513518913 is an apocalyptic number.

It is an amenable number.

513518913 is a deficient number, since it is larger than the sum of its proper divisors (247249887).

513518913 is a wasteful number, since it uses less digits than its factorization.

513518913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19019228 (or 19019222 counting only the distinct ones).

The product of its digits is 16200, while the sum is 36.

The square root of 513518913 is about 22660.9556947627. The cubic root of 513518913 is about 800.7903195076.

The spelling of 513518913 in words is "five hundred thirteen million, five hundred eighteen thousand, nine hundred thirteen".