211994207 has 2 divisors, whose sum is σ = 211994208. Its totient is φ = 211994206.

The previous prime is 211994161. The next prime is 211994221. The reversal of 211994207 is 702499112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211994207 - 2¹⁶ = 211928671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211994227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105997103 + 105997104.

It is an arithmetic number, because the mean of its divisors is an integer number (105997104).

Almost surely, 2^211994207 is an apocalyptic number.

211994207 is a deficient number, since it is larger than the sum of its proper divisors (1).

211994207 is an equidigital number, since it uses as much as digits as its factorization.

211994207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 211994207 is about 14560.0208447653. The cubic root of 211994207 is about 596.2677645761.

The spelling of 211994207 in words is "two hundred eleven million, nine hundred ninety-four thousand, two hundred seven".