31030222212 has 36 divisors (see below), whose sum is σ = 85568189616. Its totient is φ = 9403097520.

The previous prime is 31030222189. The next prime is 31030222253. The reversal of 31030222212 is 21222203013.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39179178 + ... + 39179969.

It is an arithmetic number, because the mean of its divisors is an integer number (2376894156).

Almost surely, 2^31030222212 is an apocalyptic number.

It is an amenable number.

31030222212 is an abundant number, since it is smaller than the sum of its proper divisors (54537967404).

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

31030222212 is a wasteful number, since it uses less digits than its factorization.

31030222212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78359168 (or 78359163 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 31030222212 its reverse (21222203013), we get a palindrome (52252425225).

The spelling of 31030222212 in words is "thirty-one billion, thirty million, two hundred twenty-two thousand, two hundred twelve".