513985922 has 54 divisors (see below), whose sum is σ = 877546299. Its totient is φ = 225716480.

The previous prime is 513985909. The next prime is 513985931. The reversal of 513985922 is 229589315.

It can be written as a sum of positive squares in 5 ways, for example, as 125462401 + 388523521 = 11201^2 + 19711^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=16031.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 12536222 + ... + 12536262.

Almost surely, 2^513985922 is an apocalyptic number.

513985922 is a deficient number, since it is larger than the sum of its proper divisors (363560377).

513985922 is a wasteful number, since it uses less digits than its factorization.

513985922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164 (or 83 counting only the distinct ones).

The product of its digits is 194400, while the sum is 44.

The square root of 513985922 is about 22671.2576184031. The cubic root of 513985922 is about 801.0329999398.

The spelling of 513985922 in words is "five hundred thirteen million, nine hundred eighty-five thousand, nine hundred twenty-two".