1231323222 has 32 divisors (see below), whose sum is σ = 2532529152. Its totient is φ = 398823264.

The previous prime is 1231323199. The next prime is 1231323229. The reversal of 1231323222 is 2223231321.

It is a happy number.

It is a super-2 number, since 2×1231323222² = 3032313754072922568, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231323229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 188373 + ... + 194799.

It is an arithmetic number, because the mean of its divisors is an integer number (79141536).

Almost surely, 2^1231323222 is an apocalyptic number.

1231323222 is an abundant number, since it is smaller than the sum of its proper divisors (1301205930).

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

1231323222 is a wasteful number, since it uses less digits than its factorization.

1231323222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7332.

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

The square root of 1231323222 is about 35090.2154738326. The cubic root of 1231323222 is about 1071.8253473496.

Adding to 1231323222 its reverse (2223231321), we get a palindrome (3454554543).

The spelling of 1231323222 in words is "one billion, two hundred thirty-one million, three hundred twenty-three thousand, two hundred twenty-two".