211144189 has 2 divisors, whose sum is σ = 211144190. Its totient is φ = 211144188.

The previous prime is 211144133. The next prime is 211144211. The reversal of 211144189 is 981441112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110944089 + 100200100 = 10533^2 + 10010^2 .

It is a cyclic number.

It is not a de Polignac number, because 211144189 - 2¹³ = 211135997 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 211144189.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211144489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105572094 + 105572095.

It is an arithmetic number, because the mean of its divisors is an integer number (105572095).

Almost surely, 2^211144189 is an apocalyptic number.

It is an amenable number.

211144189 is a deficient number, since it is larger than the sum of its proper divisors (1).

211144189 is an equidigital number, since it uses as much as digits as its factorization.

211144189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304, while the sum is 31.

The square root of 211144189 is about 14530.8013887741. The cubic root of 211144189 is about 595.4697596620.

It can be divided in two parts, 211 and 144189, that added together give a square (144400 = 380²).

The spelling of 211144189 in words is "two hundred eleven million, one hundred forty-four thousand, one hundred eighty-nine".