211422247 has 8 divisors (see below), whose sum is σ = 216741744. Its totient is φ = 206152128.

The previous prime is 211422223. The next prime is 211422257. The reversal of 211422247 is 742224112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 211422247 - 2⁷ = 211422119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211422257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3598 + ... + 20875.

It is an arithmetic number, because the mean of its divisors is an integer number (27092718).

Almost surely, 2^211422247 is an apocalyptic number.

211422247 is a deficient number, since it is larger than the sum of its proper divisors (5319497).

211422247 is a wasteful number, since it uses less digits than its factorization.

211422247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24689.

The product of its digits is 1792, while the sum is 25.

The square root of 211422247 is about 14540.3661233134. The cubic root of 211422247 is about 595.7310384620.

Adding to 211422247 its reverse (742224112), we get a palindrome (953646359).

The spelling of 211422247 in words is "two hundred eleven million, four hundred twenty-two thousand, two hundred forty-seven".