217241 has 2 divisors, whose sum is σ = 217242. Its totient is φ = 217240.

The previous prime is 217229. The next prime is 217253. The reversal of 217241 is 142712.

It is a balanced prime because it is at equal distance from previous prime (217229) and next prime (217253).

It can be written as a sum of positive squares in only one way, i.e., 177241 + 40000 = 421^2 + 200^2 .

It is a cyclic number.

It is not a de Polignac number, because 217241 - 2¹⁰ = 216217 is a prime.

It is a plaindrome in base 15.

It is not a weakly prime, because it can be changed into another prime (217201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108620 + 108621.

It is an arithmetic number, because the mean of its divisors is an integer number (108621).

2²¹⁷²⁴¹ is an apocalyptic number.

It is an amenable number.

217241 is a deficient number, since it is larger than the sum of its proper divisors (1).

217241 is an equidigital number, since it uses as much as digits as its factorization.

217241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 112, while the sum is 17.

The square root of 217241 is about 466.0911927939. The cubic root of 217241 is about 60.1146880453.

Adding to 217241 its reverse (142712), we get a palindrome (359953).

Subtracting from 217241 its reverse (142712), we obtain a square (74529 = 273²).

The spelling of 217241 in words is "two hundred seventeen thousand, two hundred forty-one", and thus it is an iban number.