31312130200 has 96 divisors (see below), whose sum is σ = 78469977600. Its totient is φ = 11551196160.

The previous prime is 31312130173. The next prime is 31312130203. The reversal of 31312130200 is 203121313.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31312130203) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3346729 + ... + 3356071.

It is an arithmetic number, because the mean of its divisors is an integer number (817395600).

Almost surely, 2^31312130200 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 31312130200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39234988800).

31312130200 is an abundant number, since it is smaller than the sum of its proper divisors (47157847400).

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

31312130200 is a wasteful number, since it uses less digits than its factorization.

31312130200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10661 (or 10652 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 31312130200 its reverse (203121313), we get a palindrome (31515251513).

The spelling of 31312130200 in words is "thirty-one billion, three hundred twelve million, one hundred thirty thousand, two hundred".