211995449 has 2 divisors, whose sum is σ = 211995450. Its totient is φ = 211995448.

The previous prime is 211995383. The next prime is 211995451. The reversal of 211995449 is 944599112.

211995449 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 can be written as a sum of positive squares in only one way, i.e., 211993600 + 1849 = 14560^2 + 43^2 .

It is a cyclic number.

It is not a de Polignac number, because 211995449 - 2⁸ = 211995193 is a prime.

It is a Sophie Germain prime.

Together with 211995451, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (211995499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105997724 + 105997725.

It is an arithmetic number, because the mean of its divisors is an integer number (105997725).

Almost surely, 2^211995449 is an apocalyptic number.

It is an amenable number.

211995449 is a deficient number, since it is larger than the sum of its proper divisors (1).

211995449 is an equidigital number, since it uses as much as digits as its factorization.

211995449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 116640, while the sum is 44.

The square root of 211995449 is about 14560.0634957407. The cubic root of 211995449 is about 596.2689290154.

The spelling of 211995449 in words is "two hundred eleven million, nine hundred ninety-five thousand, four hundred forty-nine".