513131928 has 32 divisors (see below), whose sum is σ = 1284045360. Its totient is φ = 170881920.

The previous prime is 513131897. The next prime is 513131951. The reversal of 513131928 is 829131315.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17238 + ... + 36378.

Almost surely, 2^513131928 is an apocalyptic number.

It is an amenable number.

513131928 is an abundant number, since it is smaller than the sum of its proper divisors (770913432).

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

513131928 is a wasteful number, since it uses less digits than its factorization.

513131928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20267 (or 20263 counting only the distinct ones).

The product of its digits is 6480, while the sum is 33.

The square root of 513131928 is about 22652.4155003390. The cubic root of 513131928 is about 800.5891119108.

The spelling of 513131928 in words is "five hundred thirteen million, one hundred thirty-one thousand, nine hundred twenty-eight".