211990199 has 2 divisors, whose sum is σ = 211990200. Its totient is φ = 211990198.

The previous prime is 211990169. The next prime is 211990231. The reversal of 211990199 is 991099112.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211990199 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211990159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105995099 + 105995100.

It is an arithmetic number, because the mean of its divisors is an integer number (105995100).

Almost surely, 2^211990199 is an apocalyptic number.

211990199 is a deficient number, since it is larger than the sum of its proper divisors (1).

211990199 is an equidigital number, since it uses as much as digits as its factorization.

211990199 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13122, while the sum is 41.

The square root of 211990199 is about 14559.8832069492. The cubic root of 211990199 is about 596.2640068378.

The spelling of 211990199 in words is "two hundred eleven million, nine hundred ninety thousand, one hundred ninety-nine".