207216189 has 6 divisors (see below), whose sum is σ = 299312286. Its totient is φ = 138144120.

The previous prime is 207216161. The next prime is 207216197. The reversal of 207216189 is 981612702.

It can be written as a sum of positive squares in only one way, i.e., 117288900 + 89927289 = 10830^2 + 9483^2 .

It is not a de Polignac number, because 207216189 - 2⁹ = 207215677 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (207216089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11512002 + ... + 11512019.

It is an arithmetic number, because the mean of its divisors is an integer number (49885381).

Almost surely, 2^207216189 is an apocalyptic number.

It is an amenable number.

207216189 is a deficient number, since it is larger than the sum of its proper divisors (92096097).

207216189 is a wasteful number, since it uses less digits than its factorization.

207216189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23024027 (or 23024024 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 207216189 is about 14395.0056964212. The cubic root of 207216189 is about 591.7540342407.

The spelling of 207216189 in words is "two hundred seven million, two hundred sixteen thousand, one hundred eighty-nine".