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22117 = 171301

22117 has 4 divisors (see below), whose sum is σ = 23436. Its totient is φ = 20800.

The previous prime is 22111. The next prime is 22123. The reversal of 22117 is 71122.

22117 is nontrivially palindromic in base 16.

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

It is an interprime number because it is at equal distance from previous prime (22111) and next prime (22123).

It can be written as a sum of positive squares in 2 ways, for example, as 6241 + 15876 = 79^2 + 126^2 .

It is a cyclic number.

It is not a de Polignac number, because 22117 - 23 = 22109 is a prime.

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a fibodiv number, since the Fibonacci-like sequence with seeds 221 and 17 contains 22117 itself.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22097 and 22106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22111) 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, 634 + ... + 667.

It is an arithmetic number, because the mean of its divisors is an integer number (5859).

222117 is an apocalyptic number.

It is an amenable number.

22117 is a deficient number, since it is larger than the sum of its proper divisors (1319).

22117 is a wasteful number, since it uses less digits than its factorization.

22117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1318.

The product of its digits is 28, while the sum is 13.

The square root of 22117 is about 148.7178536693. The cubic root of 22117 is about 28.0699780254.

Adding to 22117 its reverse (71122), we get a palindrome (93239).

The spelling of 22117 in words is "twenty-two thousand, one hundred seventeen", and thus it is an iban number.

Divisors: 1 17 1301 22117