31223322102 has 64 divisors (see below), whose sum is σ = 75983491584. Its totient is φ = 8349765120.

The previous prime is 31223322019. The next prime is 31223322133. The reversal of 31223322102 is 20122332213.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8433 + ... + 250035.

It is an arithmetic number, because the mean of its divisors is an integer number (1187242056).

Almost surely, 2^31223322102 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31223322102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37991745792).

31223322102 is an abundant number, since it is smaller than the sum of its proper divisors (44760169482).

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

31223322102 is a wasteful number, since it uses less digits than its factorization.

31223322102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241813.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 31223322102 its reverse (20122332213), we get a palindrome (51345654315).

The spelling of 31223322102 in words is "thirty-one billion, two hundred twenty-three million, three hundred twenty-two thousand, one hundred two".