217270201 has 2 divisors, whose sum is σ = 217270202. Its totient is φ = 217270200.

The previous prime is 217270199. The next prime is 217270211. The reversal of 217270201 is 102072712.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 217267600 + 2601 = 14740^2 + 51^2 .

It is a cyclic number.

It is not a de Polignac number, because 217270201 - 2¹ = 217270199 is a prime.

Together with 217270199, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (217270211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108635100 + 108635101.

It is an arithmetic number, because the mean of its divisors is an integer number (108635101).

Almost surely, 2^217270201 is an apocalyptic number.

It is an amenable number.

217270201 is a deficient number, since it is larger than the sum of its proper divisors (1).

217270201 is an equidigital number, since it uses as much as digits as its factorization.

217270201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 392, while the sum is 22.

The square root of 217270201 is about 14740.0882290439. The cubic root of 217270201 is about 601.1738141401.

The spelling of 217270201 in words is "two hundred seventeen million, two hundred seventy thousand, two hundred one".