515020168 has 64 divisors (see below), whose sum is σ = 1131021360. Its totient is φ = 217645056.

The previous prime is 515020111. The next prime is 515020189. The reversal of 515020168 is 861020515.

It can be written as a sum of positive squares in 8 ways, for example, as 193822084 + 321198084 = 13922^2 + 17922^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61480 + ... + 69352.

Almost surely, 2^515020168 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 515020168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (565510680).

515020168 is an abundant number, since it is smaller than the sum of its proper divisors (616001192).

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

515020168 is a wasteful number, since it uses less digits than its factorization.

515020168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7946 (or 7942 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 28.

The square root of 515020168 is about 22694.0557856017. The cubic root of 515020168 is about 801.5699213352.

The spelling of 515020168 in words is "five hundred fifteen million, twenty thousand, one hundred sixty-eight".