217253 has 2 divisors, whose sum is σ = 217254. Its totient is φ = 217252.

The previous prime is 217241. The next prime is 217271. The reversal of 217253 is 352712.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113569 + 103684 = 337^2 + 322^2 .

It is a cyclic number.

It is not a de Polignac number, because 217253 - 2¹⁴ = 200869 is a prime.

It is a Chen prime.

It is a plaindrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (217223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108626 + 108627.

It is an arithmetic number, because the mean of its divisors is an integer number (108627).

2²¹⁷²⁵³ is an apocalyptic number.

It is an amenable number.

217253 is a deficient number, since it is larger than the sum of its proper divisors (1).

217253 is an equidigital number, since it uses as much as digits as its factorization.

217253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 420, while the sum is 20.

The square root of 217253 is about 466.1040656334. The cubic root of 217253 is about 60.1157949004.

Adding to 217253 its reverse (352712), we get a palindrome (569965).

The spelling of 217253 in words is "two hundred seventeen thousand, two hundred fifty-three".