217283 has 4 divisors (see below), whose sum is σ = 237048. Its totient is φ = 197520.

The previous prime is 217271. The next prime is 217307. The reversal of 217283 is 382712.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 217283 - 2⁶ = 217219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (217223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9866 + ... + 9887.

It is an arithmetic number, because the mean of its divisors is an integer number (59262).

2²¹⁷²⁸³ is an apocalyptic number.

217283 is a deficient number, since it is larger than the sum of its proper divisors (19765).

217283 is a wasteful number, since it uses less digits than its factorization.

217283 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19764.

The product of its digits is 672, while the sum is 23.

The square root of 217283 is about 466.1362461770. The cubic root of 217283 is about 60.1185618601.

Adding to 217283 its reverse (382712), we get a palindrome (599995).

The spelling of 217283 in words is "two hundred seventeen thousand, two hundred eighty-three".