31223224212 has 24 divisors (see below), whose sum is σ = 72870904512. Its totient is φ = 10405353600.

The previous prime is 31223224171. The next prime is 31223224223. The reversal of 31223224212 is 21242232213.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 243589 + ... + 348972.

It is an arithmetic number, because the mean of its divisors is an integer number (3036287688).

Almost surely, 2^31223224212 is an apocalyptic number.

It is an amenable number.

31223224212 is an abundant number, since it is smaller than the sum of its proper divisors (41647680300).

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

31223224212 is a wasteful number, since it uses less digits than its factorization.

31223224212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596959 (or 596957 counting only the distinct ones).

The product of its digits is 2304, while the sum is 24.

Adding to 31223224212 its reverse (21242232213), we get a palindrome (52465456425).

The spelling of 31223224212 in words is "thirty-one billion, two hundred twenty-three million, two hundred twenty-four thousand, two hundred twelve".