515025216 has 70 divisors (see below), whose sum is σ = 1526711450. Its totient is φ = 171673344.

The previous prime is 515025211. The next prime is 515025241. The reversal of 515025216 is 612520515.

It can be written as a sum of positive squares in only one way, i.e., 498182400 + 16842816 = 22320^2 + 4104^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 515025216.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (515025211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 44491 + ... + 54858.

Almost surely, 2^515025216 is an apocalyptic number.

It is an amenable number.

515025216 is an abundant number, since it is smaller than the sum of its proper divisors (1011686234).

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

515025216 is an equidigital number, since it uses as much as digits as its factorization.

515025216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99373 (or 99354 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 515025216 is about 22694.1670038801. The cubic root of 515025216 is about 801.5725402046.

The spelling of 515025216 in words is "five hundred fifteen million, twenty-five thousand, two hundred sixteen".