211422397 has 2 divisors, whose sum is σ = 211422398. Its totient is φ = 211422396.

The previous prime is 211422389. The next prime is 211422413. The reversal of 211422397 is 793224112.

211422397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 149548441 + 61873956 = 12229^2 + 7866^2 .

It is a cyclic number.

It is not a de Polignac number, because 211422397 - 2³ = 211422389 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 (211422307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105711198 + 105711199.

It is an arithmetic number, because the mean of its divisors is an integer number (105711199).

Almost surely, 2^211422397 is an apocalyptic number.

It is an amenable number.

211422397 is a deficient number, since it is larger than the sum of its proper divisors (1).

211422397 is an equidigital number, since it uses as much as digits as its factorization.

211422397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 31.

The square root of 211422397 is about 14540.3712813669. The cubic root of 211422397 is about 595.7311793486.

The spelling of 211422397 in words is "two hundred eleven million, four hundred twenty-two thousand, three hundred ninety-seven".