515131040 has 96 divisors (see below), whose sum is σ = 1288224000. Its totient is φ = 194116608.

The previous prime is 515131037. The next prime is 515131051. The reversal of 515131040 is 40131515.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 726206 + ... + 726914.

It is an arithmetic number, because the mean of its divisors is an integer number (13419000).

Almost surely, 2^515131040 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 515131040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (644112000).

515131040 is an abundant number, since it is smaller than the sum of its proper divisors (773092960).

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

515131040 is a wasteful number, since it uses less digits than its factorization.

515131040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 982 (or 974 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 515131040 is about 22696.4984083448. The cubic root of 515131040 is about 801.6274370658.

Adding to 515131040 its reverse (40131515), we get a palindrome (555262555).

The spelling of 515131040 in words is "five hundred fifteen million, one hundred thirty-one thousand, forty".