31012322022 has 72 divisors (see below), whose sum is σ = 74747450232. Its totient is φ = 9284394240.

The previous prime is 31012321999. The next prime is 31012322039. The reversal of 31012322022 is 22022321013.

31012322022 is a `hidden beast` number, since 310 + 12 + 322 + 0 + 22 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 31012321986 and 31012322004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 94998 + ... + 266550.

It is an arithmetic number, because the mean of its divisors is an integer number (1038159031).

Almost surely, 2^31012322022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31012322022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37373725116).

31012322022 is an abundant number, since it is smaller than the sum of its proper divisors (43735128210).

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

31012322022 is a wasteful number, since it uses less digits than its factorization.

31012322022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171666 (or 171652 counting only the distinct ones).

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

Adding to 31012322022 its reverse (22022321013), we get a palindrome (53034643035).

The spelling of 31012322022 in words is "thirty-one billion, twelve million, three hundred twenty-two thousand, twenty-two".