2231031222 has 64 divisors (see below), whose sum is σ = 5680765440. Its totient is φ = 635789088.

The previous prime is 2231031197. The next prime is 2231031233. The reversal of 2231031222 is 2221301322.

2231031222 is a `hidden beast` number, since 22 + 310 + 312 + 22 = 666.

It is a super-3 number, since 3×2231031222³ (a number of 29 digits) contains 333 as substring.

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 = 2231031195 and 2231031204.

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, 142633 + ... + 157499.

It is an arithmetic number, because the mean of its divisors is an integer number (88761960).

Almost surely, 2^2231031222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2231031222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2840382720).

2231031222 is an abundant number, since it is smaller than the sum of its proper divisors (3449734218).

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

2231031222 is a wasteful number, since it uses less digits than its factorization.

2231031222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15282 (or 15276 counting only the distinct ones).

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

The square root of 2231031222 is about 47233.7932205323. The cubic root of 2231031222 is about 1306.6779103948.

Adding to 2231031222 its reverse (2221301322), we get a palindrome (4452332544).

The spelling of 2231031222 in words is "two billion, two hundred thirty-one million, thirty-one thousand, two hundred twenty-two".