2031231222 has 32 divisors (see below), whose sum is σ = 4523174400. Its totient is φ = 675678024.

The previous prime is 2031231221. The next prime is 2031231287. The reversal of 2031231222 is 2221321302.

2031231222 is a `hidden beast` number, since 20 + 312 + 312 + 22 = 666.

It is a super-2 number, since 2×2031231222² = 8251800554455226568, which contains 22 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 = 2031231195 and 2031231204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2031231221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12322 + ... + 64917.

It is an arithmetic number, because the mean of its divisors is an integer number (141349200).

Almost surely, 2^2031231222 is an apocalyptic number.

2031231222 is an abundant number, since it is smaller than the sum of its proper divisors (2491943178).

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

2031231222 is a wasteful number, since it uses less digits than its factorization.

2031231222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77737 (or 77731 counting only the distinct ones).

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

The square root of 2031231222 is about 45069.1826196127. The cubic root of 2031231222 is about 1266.4453521771.

Adding to 2031231222 its reverse (2221321302), we get a palindrome (4252552524).

The spelling of 2031231222 in words is "two billion, thirty-one million, two hundred thirty-one thousand, two hundred twenty-two".