31222022312 has 16 divisors (see below), whose sum is σ = 63044468340. Its totient is φ = 14410164096.

The previous prime is 31222022281. The next prime is 31222022323. The reversal of 31222022312 is 21322022213.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 27196627396 + 4025394916 = 164914^2 + 63446^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150105773 + ... + 150105980.

Almost surely, 2^31222022312 is an apocalyptic number.

It is an amenable number.

31222022312 is an abundant number, since it is smaller than the sum of its proper divisors (31822446028).

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

31222022312 is a wasteful number, since it uses less digits than its factorization.

31222022312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300211772 (or 300211768 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 31222022312 its reverse (21322022213), we get a palindrome (52544044525).

Subtracting from 31222022312 its reverse (21322022213), we obtain a palindrome (9900000099).

The spelling of 31222022312 in words is "thirty-one billion, two hundred twenty-two million, twenty-two thousand, three hundred twelve".