31980222 has 24 divisors (see below), whose sum is σ = 69411576. Its totient is φ = 10641456.

The previous prime is 31980217. The next prime is 31980229. The reversal of 31980222 is 22208913.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31980229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12453 + ... + 14799.

It is an arithmetic number, because the mean of its divisors is an integer number (2892149).

Almost surely, 2^31980222 is an apocalyptic number.

31980222 is an abundant number, since it is smaller than the sum of its proper divisors (37431354).

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

31980222 is a wasteful number, since it uses less digits than its factorization.

31980222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3112 (or 3109 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 31980222 is about 5655.1058345534. The cubic root of 31980222 is about 317.4147893762.

The spelling of 31980222 in words is "thirty-one million, nine hundred eighty thousand, two hundred twenty-two".