217197 has 6 divisors (see below), whose sum is σ = 313742. Its totient is φ = 144792.

The previous prime is 217169. The next prime is 217199. The reversal of 217197 is 791712.

217197 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 181476 + 35721 = 426^2 + 189^2 .

It is not a de Polignac number, because 217197 - 2⁷ = 217069 is a prime.

It is a Duffinian number.

217197 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 217197.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217199) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12058 + ... + 12075.

2²¹⁷¹⁹⁷ is an apocalyptic number.

It is an amenable number.

217197 is a deficient number, since it is larger than the sum of its proper divisors (96545).

217197 is a wasteful number, since it uses less digits than its factorization.

217197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24139 (or 24136 counting only the distinct ones).

The product of its digits is 882, while the sum is 27.

The square root of 217197 is about 466.0439893401. The cubic root of 217197 is about 60.1106292275.

It can be divided in two parts, 217 and 197, that added together give a palindrome (414).

The spelling of 217197 in words is "two hundred seventeen thousand, one hundred ninety-seven".