515731272 has 96 divisors (see below), whose sum is σ = 1525456800. Its totient is φ = 144834816.

The previous prime is 515731267. The next prime is 515731301. The reversal of 515731272 is 272137515.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 65668 + ... + 73100.

It is an arithmetic number, because the mean of its divisors is an integer number (15890175).

Almost surely, 2^515731272 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 515731272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (762728400).

515731272 is an abundant number, since it is smaller than the sum of its proper divisors (1009725528).

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

515731272 is a wasteful number, since it uses less digits than its factorization.

515731272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7515 (or 7504 counting only the distinct ones).

The product of its digits is 14700, while the sum is 33.

The square root of 515731272 is about 22709.7175675965. The cubic root of 515731272 is about 801.9386689915.

Adding to 515731272 its reverse (272137515), we get a palindrome (787868787).

The spelling of 515731272 in words is "five hundred fifteen million, seven hundred thirty-one thousand, two hundred seventy-two".