515231140 has 12 divisors (see below), whose sum is σ = 1081985436. Its totient is φ = 206092448.

The previous prime is 515231131. The next prime is 515231159. The reversal of 515231140 is 41132515.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 315630756 + 199600384 = 17766^2 + 14128^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12880759 + ... + 12880798.

It is an arithmetic number, because the mean of its divisors is an integer number (90165453).

Almost surely, 2^515231140 is an apocalyptic number.

It is an amenable number.

515231140 is an abundant number, since it is smaller than the sum of its proper divisors (566754296).

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

515231140 is a wasteful number, since it uses less digits than its factorization.

515231140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25761566 (or 25761564 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 515231140 is about 22698.7034872038. The cubic root of 515231140 is about 801.6793576473.

Adding to 515231140 its reverse (41132515), we get a palindrome (556363655).

The spelling of 515231140 in words is "five hundred fifteen million, two hundred thirty-one thousand, one hundred forty".