2171203189 has 2 divisors, whose sum is σ = 2171203190. Its totient is φ = 2171203188.

The previous prime is 2171203163. The next prime is 2171203249. The reversal of 2171203189 is 9813021712.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1471336164 + 699867025 = 38358^2 + 26455^2 .

It is a cyclic number.

It is not a de Polignac number, because 2171203189 - 2¹⁷ = 2171072117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2171200189) 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 as a sum of consecutive naturals, namely, 1085601594 + 1085601595.

It is an arithmetic number, because the mean of its divisors is an integer number (1085601595).

Almost surely, 2^2171203189 is an apocalyptic number.

It is an amenable number.

2171203189 is a deficient number, since it is larger than the sum of its proper divisors (1).

2171203189 is an equidigital number, since it uses as much as digits as its factorization.

2171203189 is an odious number, because the sum of its binary digits is odd.

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

The square root of 2171203189 is about 46596.1713985173. The cubic root of 2171203189 is about 1294.8918260095.

The spelling of 2171203189 in words is "two billion, one hundred seventy-one million, two hundred three thousand, one hundred eighty-nine".