211217 has 2 divisors, whose sum is σ = 211218. Its totient is φ = 211216.

The previous prime is 211213. The next prime is 211219. The reversal of 211217 is 712112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 192721 + 18496 = 439^2 + 136^2 .

It is a cyclic number.

It is not a de Polignac number, because 211217 - 2² = 211213 is a prime.

It is a super-2 number, since 2×211217² = 89225242178, which contains 22 as substring.

Together with 211219, it forms a pair of twin primes.

It is a Chen prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 211217.

It is not a weakly prime, because it can be changed into another prime (211213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105608 + 105609.

It is an arithmetic number, because the mean of its divisors is an integer number (105609).

2²¹¹²¹⁷ is an apocalyptic number.

It is an amenable number.

211217 is a deficient number, since it is larger than the sum of its proper divisors (1).

211217 is an equidigital number, since it uses as much as digits as its factorization.

211217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28, while the sum is 14.

The square root of 211217 is about 459.5835071018. The cubic root of 211217 is about 59.5538199095.

Adding to 211217 its reverse (712112), we get a palindrome (923329).

The spelling of 211217 in words is "two hundred eleven thousand, two hundred seventeen", and thus it is an iban number.