7216189 has 4 divisors (see below), whose sum is σ = 7222624. Its totient is φ = 7209756.

The previous prime is 7216169. The next prime is 7216193. The reversal of 7216189 is 9816127.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 7216189 - 2⁷ = 7216061 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7216129) by changing a digit.

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, 1047 + ... + 3940.

It is an arithmetic number, because the mean of its divisors is an integer number (1805656).

Almost surely, 2^7216189 is an apocalyptic number.

It is an amenable number.

7216189 is a deficient number, since it is larger than the sum of its proper divisors (6435).

7216189 is a wasteful number, since it uses less digits than its factorization.

7216189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6434.

The product of its digits is 6048, while the sum is 34.

The square root of 7216189 is about 2686.2965212351. The cubic root of 7216189 is about 193.2424936571.

It can be divided in two parts, 72 and 16189, that added together give a palindrome (16261).

The spelling of 7216189 in words is "seven million, two hundred sixteen thousand, one hundred eighty-nine".