12216344 has 16 divisors (see below), whose sum is σ = 26178000. Its totient is φ = 5235552.

The previous prime is 12216313. The next prime is 12216349. The reversal of 12216344 is 44361221.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12216349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109019 + ... + 109130.

It is an arithmetic number, because the mean of its divisors is an integer number (1636125).

Almost surely, 2^12216344 is an apocalyptic number.

12216344 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

12216344 is an abundant number, since it is smaller than the sum of its proper divisors (13961656).

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

12216344 is a wasteful number, since it uses less digits than its factorization.

12216344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218162 (or 218158 counting only the distinct ones).

The product of its digits is 1152, while the sum is 23.

The square root of 12216344 is about 3495.1886930465. The cubic root of 12216344 is about 230.3105068937.

Adding to 12216344 its reverse (44361221), we get a palindrome (56577565).

The spelling of 12216344 in words is "twelve million, two hundred sixteen thousand, three hundred forty-four".