211422223 has 2 divisors, whose sum is σ = 211422224. Its totient is φ = 211422222.

The previous prime is 211422221. The next prime is 211422257. The reversal of 211422223 is 322224112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211422223 - 2¹ = 211422221 is a prime.

Together with 211422221, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 211422223.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211422221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105711111 + 105711112.

It is an arithmetic number, because the mean of its divisors is an integer number (105711112).

Almost surely, 2^211422223 is an apocalyptic number.

211422223 is a deficient number, since it is larger than the sum of its proper divisors (1).

211422223 is an equidigital number, since it uses as much as digits as its factorization.

211422223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 384, while the sum is 19.

The square root of 211422223 is about 14540.3652980247. The cubic root of 211422223 is about 595.7310159202.

Adding to 211422223 its reverse (322224112), we get a palindrome (533646335).

The spelling of 211422223 in words is "two hundred eleven million, four hundred twenty-two thousand, two hundred twenty-three".