513981964 has 12 divisors (see below), whose sum is σ = 930484800. Its totient is φ = 248129168.

The previous prime is 513981947. The next prime is 513981973. The reversal of 513981964 is 469189315.

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, 2215324 + ... + 2215555.

It is an arithmetic number, because the mean of its divisors is an integer number (77540400).

Almost surely, 2^513981964 is an apocalyptic number.

It is an amenable number.

513981964 is a deficient number, since it is larger than the sum of its proper divisors (416502836).

513981964 is a wasteful number, since it uses less digits than its factorization.

513981964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4430912 (or 4430910 counting only the distinct ones).

The product of its digits is 233280, while the sum is 46.

The square root of 513981964 is about 22671.1703270916. The cubic root of 513981964 is about 801.0309437896.

The spelling of 513981964 in words is "five hundred thirteen million, nine hundred eighty-one thousand, nine hundred sixty-four".