515115438 has 16 divisors (see below), whose sum is σ = 1030581120. Its totient is φ = 171646776.

The previous prime is 515115413. The next prime is 515115439. The reversal of 515115438 is 834511515.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 515115399 and 515115408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (515115439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6981 + ... + 32847.

It is an arithmetic number, because the mean of its divisors is an integer number (64411320).

Almost surely, 2^515115438 is an apocalyptic number.

515115438 is an abundant number, since it is smaller than the sum of its proper divisors (515465682).

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

515115438 is a wasteful number, since it uses less digits than its factorization.

515115438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29191.

The product of its digits is 12000, while the sum is 33.

The square root of 515115438 is about 22696.1546963357. The cubic root of 515115438 is about 801.6193439033.

The spelling of 515115438 in words is "five hundred fifteen million, one hundred fifteen thousand, four hundred thirty-eight".