31013213200 has 60 divisors (see below), whose sum is σ = 76094593920. Its totient is φ = 12141335680.

The previous prime is 31013213173. The next prime is 31013213207. The reversal of 31013213200 is 231231013.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (31013213207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 806020 + ... + 843619.

It is an arithmetic number, because the mean of its divisors is an integer number (1268243232).

Almost surely, 2^31013213200 is an apocalyptic number.

It is an amenable number.

31013213200 is an abundant number, since it is smaller than the sum of its proper divisors (45081380720).

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

31013213200 is a wasteful number, since it uses less digits than its factorization.

31013213200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1649704 (or 1649693 counting only the distinct ones).

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

Adding to 31013213200 its reverse (231231013), we get a palindrome (31244444213).

The spelling of 31013213200 in words is "thirty-one billion, thirteen million, two hundred thirteen thousand, two hundred".