12216189 has 16 divisors (see below), whose sum is σ = 16740864. Its totient is φ = 7921200.

The previous prime is 12216187. The next prime is 12216199. The reversal of 12216189 is 98161221.

It is a happy number.

It is not a de Polignac number, because 12216189 - 2¹ = 12216187 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12216181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17334 + ... + 18024.

It is an arithmetic number, because the mean of its divisors is an integer number (1046304).

Almost surely, 2^12216189 is an apocalyptic number.

It is an amenable number.

12216189 is a deficient number, since it is larger than the sum of its proper divisors (4524675).

12216189 is an equidigital number, since it uses as much as digits as its factorization.

12216189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 848.

The product of its digits is 1728, while the sum is 30.

The square root of 12216189 is about 3495.1665196382. The cubic root of 12216189 is about 230.3095328358.

The spelling of 12216189 in words is "twelve million, two hundred sixteen thousand, one hundred eighty-nine".