13231222 has 8 divisors (see below), whose sum is σ = 20183400. Its totient is φ = 6503424.

The previous prime is 13231189. The next prime is 13231247. The reversal of 13231222 is 22213231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×13231222² = 350130471226568, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13231196 and 13231205.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55947 + ... + 56182.

It is an arithmetic number, because the mean of its divisors is an integer number (2522925).

Almost surely, 2^13231222 is an apocalyptic number.

13231222 is a deficient number, since it is larger than the sum of its proper divisors (6952178).

13231222 is a wasteful number, since it uses less digits than its factorization.

13231222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112190.

The product of its digits is 144, while the sum is 16.

The square root of 13231222 is about 3637.4746734513. The cubic root of 13231222 is about 236.5193365468.

Adding to 13231222 its reverse (22213231), we get a palindrome (35444453).

Subtracting 13231222 from its reverse (22213231), we obtain a square (8982009 = 2997²).

The spelling of 13231222 in words is "thirteen million, two hundred thirty-one thousand, two hundred twenty-two".