217216201 has 2 divisors, whose sum is σ = 217216202. Its totient is φ = 217216200.

The previous prime is 217216199. The next prime is 217216247. The reversal of 217216201 is 102612712.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 214329600 + 2886601 = 14640^2 + 1699^2 .

It is a cyclic number.

It is not a de Polignac number, because 217216201 - 2¹ = 217216199 is a prime.

Together with 217216199, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (217216001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108608100 + 108608101.

It is an arithmetic number, because the mean of its divisors is an integer number (108608101).

Almost surely, 2^217216201 is an apocalyptic number.

It is an amenable number.

217216201 is a deficient number, since it is larger than the sum of its proper divisors (1).

217216201 is an equidigital number, since it uses as much as digits as its factorization.

217216201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 217216201 is about 14738.2563758404. The cubic root of 217216201 is about 601.1240050765.

Adding to 217216201 its reverse (102612712), we get a palindrome (319828913).

The spelling of 217216201 in words is "two hundred seventeen million, two hundred sixteen thousand, two hundred one".