2189217187 has 2 divisors, whose sum is σ = 2189217188. Its totient is φ = 2189217186.

The previous prime is 2189217169. The next prime is 2189217193. The reversal of 2189217187 is 7817129812.

2189217187 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2189217187 - 2⁷ = 2189217059 is a prime.

It is not a weakly prime, because it can be changed into another prime (2189217127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1094608593 + 1094608594.

It is an arithmetic number, because the mean of its divisors is an integer number (1094608594).

Almost surely, 2^2189217187 is an apocalyptic number.

2189217187 is a deficient number, since it is larger than the sum of its proper divisors (1).

2189217187 is an equidigital number, since it uses as much as digits as its factorization.

2189217187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 112896, while the sum is 46.

The square root of 2189217187 is about 46789.0712346377. The cubic root of 2189217187 is about 1298.4631121767.

The spelling of 2189217187 in words is "two billion, one hundred eighty-nine million, two hundred seventeen thousand, one hundred eighty-seven".