12813222 has 8 divisors (see below), whose sum is σ = 25626456. Its totient is φ = 4271072.

The previous prime is 12813217. The next prime is 12813253. The reversal of 12813222 is 22231821.

It is a happy number.

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

12813222 is an admirable number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1067763 + ... + 1067774.

It is an arithmetic number, because the mean of its divisors is an integer number (3203307).

Almost surely, 2^12813222 is an apocalyptic number.

12813222 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12813222 is a wasteful number, since it uses less digits than its factorization.

12813222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2135542.

The product of its digits is 384, while the sum is 21.

The square root of 12813222 is about 3579.5561177330. The cubic root of 12813222 is about 234.0019358449.

The spelling of 12813222 in words is "twelve million, eight hundred thirteen thousand, two hundred twenty-two".