31350813212 has 12 divisors (see below), whose sum is σ = 56346732120. Its totient is φ = 15251746896.

The previous prime is 31350813209. The next prime is 31350813217. The reversal of 31350813212 is 21231805313.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31350813217) 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, 105914762 + ... + 105915057.

It is an arithmetic number, because the mean of its divisors is an integer number (4695561010).

Almost surely, 2^31350813212 is an apocalyptic number.

It is an amenable number.

31350813212 is a deficient number, since it is larger than the sum of its proper divisors (24995918908).

31350813212 is a wasteful number, since it uses less digits than its factorization.

31350813212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211829860 (or 211829858 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The spelling of 31350813212 in words is "thirty-one billion, three hundred fifty million, eight hundred thirteen thousand, two hundred twelve".