211331189 has 2 divisors, whose sum is σ = 211331190. Its totient is φ = 211331188.

The previous prime is 211331173. The next prime is 211331203. The reversal of 211331189 is 981133112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143400625 + 67930564 = 11975^2 + 8242^2 .

It is a cyclic number.

It is not a de Polignac number, because 211331189 - 2⁴ = 211331173 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211331089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105665594 + 105665595.

It is an arithmetic number, because the mean of its divisors is an integer number (105665595).

Almost surely, 2^211331189 is an apocalyptic number.

It is an amenable number.

211331189 is a deficient number, since it is larger than the sum of its proper divisors (1).

211331189 is an equidigital number, since it uses as much as digits as its factorization.

211331189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 29.

The square root of 211331189 is about 14537.2345719535. The cubic root of 211331189 is about 595.6455005281.

It can be divided in two parts, 21133 and 1189, that added together give a palindrome (22322).

The spelling of 211331189 in words is "two hundred eleven million, three hundred thirty-one thousand, one hundred eighty-nine".