815031130 has 32 divisors (see below), whose sum is σ = 1492015824. Its totient is φ = 320495616.

The previous prime is 815031127. The next prime is 815031181. The reversal of 815031130 is 31130518.

It can be written as a sum of positive squares in 8 ways, for example, as 485717521 + 329313609 = 22039^2 + 18147^2 .

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, 244354 + ... + 247666.

Almost surely, 2^815031130 is an apocalyptic number.

815031130 is a deficient number, since it is larger than the sum of its proper divisors (676984694).

815031130 is a wasteful number, since it uses less digits than its factorization.

815031130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3730.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 815031130 is about 28548.7500602040. The cubic root of 815031130 is about 934.0957561313.

Adding to 815031130 its reverse (31130518), we get a palindrome (846161648).

The spelling of 815031130 in words is "eight hundred fifteen million, thirty-one thousand, one hundred thirty".