515531012 has 6 divisors (see below), whose sum is σ = 902179278. Its totient is φ = 257765504.

The previous prime is 515530997. The next prime is 515531017. The reversal of 515531012 is 210135515.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 422138116 + 93392896 = 20546^2 + 9664^2 .

It is not an unprimeable number, because it can be changed into a prime (515531017) by changing a digit.

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 as a sum of consecutive naturals, namely, 64441373 + ... + 64441380.

It is an arithmetic number, because the mean of its divisors is an integer number (150363213).

Almost surely, 2^515531012 is an apocalyptic number.

It is an amenable number.

515531012 is a deficient number, since it is larger than the sum of its proper divisors (386648266).

515531012 is a wasteful number, since it uses less digits than its factorization.

515531012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128882757 (or 128882755 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 515531012 is about 22705.3080137663. The cubic root of 515531012 is about 801.8348571566.

Adding to 515531012 its reverse (210135515), we get a palindrome (725666527).

The spelling of 515531012 in words is "five hundred fifteen million, five hundred thirty-one thousand, twelve".