211994 has 4 divisors (see below), whose sum is σ = 317994. Its totient is φ = 105996.

The previous prime is 211979. The next prime is 211997. The reversal of 211994 is 499112.

211994 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 190969 + 21025 = 437^2 + 145^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (211997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52997 + ... + 53000.

2²¹¹⁹⁹⁴ is an apocalyptic number.

211994 is a deficient number, since it is larger than the sum of its proper divisors (106000).

211994 is a wasteful number, since it uses less digits than its factorization.

211994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105999.

The product of its digits is 648, while the sum is 26.

The square root of 211994 is about 460.4280616991. The cubic root of 211994 is about 59.6267570502.

The spelling of 211994 in words is "two hundred eleven thousand, nine hundred ninety-four".