513117868 has 24 divisors (see below), whose sum is σ = 951501600. Its totient is φ = 241283328.

The previous prime is 513117863. The next prime is 513117889. The reversal of 513117868 is 868711315.

It is a self number, because there is not a number n which added to its sum of digits gives 513117868.

It is not an unprimeable number, because it can be changed into a prime (513117863) 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, 136113 + ... + 139831.

It is an arithmetic number, because the mean of its divisors is an integer number (39645900).

Almost surely, 2^513117868 is an apocalyptic number.

It is an amenable number.

513117868 is a deficient number, since it is larger than the sum of its proper divisors (438383732).

513117868 is a wasteful number, since it uses less digits than its factorization.

513117868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5769 (or 5767 counting only the distinct ones).

The product of its digits is 40320, while the sum is 40.

The square root of 513117868 is about 22652.1051560335. The cubic root of 513117868 is about 800.5817997005.

The spelling of 513117868 in words is "five hundred thirteen million, one hundred seventeen thousand, eight hundred sixty-eight".