31313300212 has 48 divisors (see below), whose sum is σ = 59528189952. Its totient is φ = 14354887680.

The previous prime is 31313300203. The next prime is 31313300233. The reversal of 31313300212 is 21200331313.

It is a self number, because there is not a number n which added to its sum of digits gives 31313300212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1105912 + ... + 1133872.

It is an arithmetic number, because the mean of its divisors is an integer number (1240170624).

Almost surely, 2^31313300212 is an apocalyptic number.

It is an amenable number.

31313300212 is a deficient number, since it is larger than the sum of its proper divisors (28214889740).

31313300212 is a wasteful number, since it uses less digits than its factorization.

31313300212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28408 (or 28406 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 31313300212 its reverse (21200331313), we get a palindrome (52513631525).

The spelling of 31313300212 in words is "thirty-one billion, three hundred thirteen million, three hundred thousand, two hundred twelve".