16213189 has 6 divisors (see below), whose sum is σ = 17223314. Its totient is φ = 15259200.

The previous prime is 16213187. The next prime is 16213207. The reversal of 16213189 is 98131261.

It can be written as a sum of positive squares in 3 ways, for example, as 7745089 + 8468100 = 2783^2 + 2910^2 .

It is not a de Polignac number, because 16213189 - 2¹ = 16213187 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16213189.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16213187) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27762 + ... + 28339.

Almost surely, 2^16213189 is an apocalyptic number.

It is an amenable number.

16213189 is a deficient number, since it is larger than the sum of its proper divisors (1010125).

16213189 is an equidigital number, since it uses as much as digits as its factorization.

16213189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56135 (or 56118 counting only the distinct ones).

The product of its digits is 2592, while the sum is 31.

The square root of 16213189 is about 4026.5604428594. The cubic root of 16213189 is about 253.0984478372.

The spelling of 16213189 in words is "sixteen million, two hundred thirteen thousand, one hundred eighty-nine".