2031321222 has 96 divisors (see below), whose sum is σ = 5295932928. Its totient is φ = 550142208.

The previous prime is 2031321139. The next prime is 2031321311. The reversal of 2031321222 is 2221231302.

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 = 2031321195 and 2031321204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 324373 + ... + 330575.

It is an arithmetic number, because the mean of its divisors is an integer number (55165968).

Almost surely, 2^2031321222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2031321222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2647966464).

2031321222 is an abundant number, since it is smaller than the sum of its proper divisors (3264611706).

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

2031321222 is a wasteful number, since it uses less digits than its factorization.

2031321222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6354 (or 6351 counting only the distinct ones).

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

The square root of 2031321222 is about 45070.1810735213. The cubic root of 2031321222 is about 1266.4640564974.

Adding to 2031321222 its reverse (2221231302), we get a palindrome (4252552524).

The spelling of 2031321222 in words is "two billion, thirty-one million, three hundred twenty-one thousand, two hundred twenty-two".