130031816 has 16 divisors (see below), whose sum is σ = 244513500. Its totient is φ = 64828224.

The previous prime is 130031813. The next prime is 130031831. The reversal of 130031816 is 618130031.

It can be written as a sum of positive squares in 2 ways, for example, as 122988100 + 7043716 = 11090^2 + 2654^2 .

It is a junction number, because it is equal to n+sod(n) for n = 130031791 and 130031800.

It is not an unprimeable number, because it can be changed into a prime (130031813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20495 + ... + 26078.

Almost surely, 2^130031816 is an apocalyptic number.

It is an amenable number.

130031816 is a deficient number, since it is larger than the sum of its proper divisors (114481684).

130031816 is a wasteful number, since it uses less digits than its factorization.

130031816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46928 (or 46924 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 130031816 is about 11403.1493895327. The cubic root of 130031816 is about 506.6210250514.

Adding to 130031816 its reverse (618130031), we get a palindrome (748161847).

The spelling of 130031816 in words is "one hundred thirty million, thirty-one thousand, eight hundred sixteen".