513235668 has 24 divisors (see below), whose sum is σ = 1306418400. Its totient is φ = 155525920.

The previous prime is 513235637. The next prime is 513235687. The reversal of 513235668 is 866532315.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1943943 + ... + 1944206.

It is an arithmetic number, because the mean of its divisors is an integer number (54434100).

Almost surely, 2^513235668 is an apocalyptic number.

It is an amenable number.

513235668 is an abundant number, since it is smaller than the sum of its proper divisors (793182732).

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

513235668 is a wasteful number, since it uses less digits than its factorization.

513235668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3888167 (or 3888165 counting only the distinct ones).

The product of its digits is 129600, while the sum is 39.

The square root of 513235668 is about 22654.7052066453. The cubic root of 513235668 is about 800.6430600371.

The spelling of 513235668 in words is "five hundred thirteen million, two hundred thirty-five thousand, six hundred sixty-eight".