515155240 has 16 divisors (see below), whose sum is σ = 1159099380. Its totient is φ = 206062080.

The previous prime is 515155231. The next prime is 515155243. The reversal of 515155240 is 42551515.

It can be written as a sum of positive squares in 2 ways, for example, as 431725284 + 83429956 = 20778^2 + 9134^2 .

It is a junction number, because it is equal to n+sod(n) for n = 515155199 and 515155208.

It is not an unprimeable number, because it can be changed into a prime (515155243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6439401 + ... + 6439480.

Almost surely, 2^515155240 is an apocalyptic number.

It is an amenable number.

515155240 is an abundant number, since it is smaller than the sum of its proper divisors (643944140).

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

515155240 is a wasteful number, since it uses less digits than its factorization.

515155240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12878892 (or 12878888 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 28.

The square root of 515155240 is about 22697.0315239681. The cubic root of 515155240 is about 801.6399899107.

The spelling of 515155240 in words is "five hundred fifteen million, one hundred fifty-five thousand, two hundred forty".