31130313203 has 16 divisors (see below), whose sum is σ = 35934935040. Its totient is φ = 26670391200.

The previous prime is 31130313199. The next prime is 31130313209. The reversal of 31130313203 is 30231303113.

It is not a de Polignac number, because 31130313203 - 2² = 31130313199 is a prime.

It is a super-2 number, since 2×31130313203² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31130313209) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 350000 + ... + 429837.

It is an arithmetic number, because the mean of its divisors is an integer number (2245933440).

Almost surely, 2^31130313203 is an apocalyptic number.

31130313203 is a deficient number, since it is larger than the sum of its proper divisors (4804621837).

31130313203 is a wasteful number, since it uses less digits than its factorization.

31130313203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780058.

The product of its (nonzero) digits is 486, while the sum is 20.

Adding to 31130313203 its reverse (30231303113), we get a palindrome (61361616316).

The spelling of 31130313203 in words is "thirty-one billion, one hundred thirty million, three hundred thirteen thousand, two hundred three".