217103 has 4 divisors (see below), whose sum is σ = 219240. Its totient is φ = 214968.

The previous prime is 217081. The next prime is 217111. The reversal of 217103 is 301712.

217103 is nontrivially palindromic in base 14.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-217103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217163) 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, 908 + ... + 1121.

It is an arithmetic number, because the mean of its divisors is an integer number (54810).

2²¹⁷¹⁰³ is an apocalyptic number.

217103 is a deficient number, since it is larger than the sum of its proper divisors (2137).

217103 is a wasteful number, since it uses less digits than its factorization.

217103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2136.

The product of its (nonzero) digits is 42, while the sum is 14.

The square root of 217103 is about 465.9431295770. The cubic root of 217103 is about 60.1019562801.

Adding to 217103 its reverse (301712), we get a palindrome (518815).

The spelling of 217103 in words is "two hundred seventeen thousand, one hundred three", and thus it is an iban number.