12213444 has 12 divisors (see below), whose sum is σ = 28498064. Its totient is φ = 4071144.

The previous prime is 12213403. The next prime is 12213469. The reversal of 12213444 is 44431221.

12213444 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×12213444² = 298336428682272, which contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 12213444.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 508882 + ... + 508905.

Almost surely, 2^12213444 is an apocalyptic number.

It is an amenable number.

12213444 is an abundant number, since it is smaller than the sum of its proper divisors (16284620).

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

12213444 is a wasteful number, since it uses less digits than its factorization.

12213444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1017794 (or 1017792 counting only the distinct ones).

The product of its digits is 768, while the sum is 21.

The square root of 12213444 is about 3494.7738124233. The cubic root of 12213444 is about 230.2922812193.

Adding to 12213444 its reverse (44431221), we get a palindrome (56644665).

The spelling of 12213444 in words is "twelve million, two hundred thirteen thousand, four hundred forty-four".