211422307 has 2 divisors, whose sum is σ = 211422308. Its totient is φ = 211422306.

The previous prime is 211422257. The next prime is 211422347. The reversal of 211422307 is 703224112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211422307 - 2¹⁵ = 211389539 is a prime.

It is not a weakly prime, because it can be changed into another prime (211422347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105711153 + 105711154.

It is an arithmetic number, because the mean of its divisors is an integer number (105711154).

Almost surely, 2^211422307 is an apocalyptic number.

211422307 is a deficient number, since it is larger than the sum of its proper divisors (1).

211422307 is an equidigital number, since it uses as much as digits as its factorization.

211422307 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 211422307 is about 14540.3681865350. The cubic root of 211422307 is about 595.7310948166.

Adding to 211422307 its reverse (703224112), we get a palindrome (914646419).

The spelling of 211422307 in words is "two hundred eleven million, four hundred twenty-two thousand, three hundred seven".