16223189 has 2 divisors, whose sum is σ = 16223190. Its totient is φ = 16223188.

The previous prime is 16223183. The next prime is 16223191. The reversal of 16223189 is 98132261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15288100 + 935089 = 3910^2 + 967^2 .

It is an emirp because it is prime and its reverse (98132261) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16223189 - 2⁴ = 16223173 is a prime.

It is a super-2 number, since 2×16223189² = 526383722659442, which contains 22 as substring.

Together with 16223191, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16223183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8111594 + 8111595.

It is an arithmetic number, because the mean of its divisors is an integer number (8111595).

Almost surely, 2^16223189 is an apocalyptic number.

It is an amenable number.

16223189 is a deficient number, since it is larger than the sum of its proper divisors (1).

16223189 is an equidigital number, since it uses as much as digits as its factorization.

16223189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 32.

The square root of 16223189 is about 4027.8020060574. The cubic root of 16223189 is about 253.1504726486.

The spelling of 16223189 in words is "sixteen million, two hundred twenty-three thousand, one hundred eighty-nine".