211943 has 2 divisors, whose sum is σ = 211944. Its totient is φ = 211942.

The previous prime is 211933. The next prime is 211949. The reversal of 211943 is 349112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211943 - 2⁴ = 211927 is a prime.

It is a super-3 number, since 3×211943³ = 28561333926536421, which contains 333 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211949) 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, 105971 + 105972.

It is an arithmetic number, because the mean of its divisors is an integer number (105972).

2²¹¹⁹⁴³ is an apocalyptic number.

211943 is a deficient number, since it is larger than the sum of its proper divisors (1).

211943 is an equidigital number, since it uses as much as digits as its factorization.

211943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216, while the sum is 20.

The square root of 211943 is about 460.3726751231. The cubic root of 211943 is about 59.6219751405.

The spelling of 211943 in words is "two hundred eleven thousand, nine hundred forty-three".