22318 has 4 divisors (see below), whose sum is σ = 33480. Its totient is φ = 11158.

The previous prime is 22307. The next prime is 22343. The reversal of 22318 is 81322.

It is a happy number.

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

It is a super-3 number, since 3×22318³ = 33349327024296, which contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

22318 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5578 + ... + 5581.

It is an arithmetic number, because the mean of its divisors is an integer number (8370).

2²²³¹⁸ is an apocalyptic number.

22318 is a deficient number, since it is larger than the sum of its proper divisors (11162).

22318 is a wasteful number, since it uses less digits than its factorization.

22318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11161.

The product of its digits is 96, while the sum is 16.

The square root of 22318 is about 149.3921015315. The cubic root of 22318 is about 28.1547553400.

Subtracting from 22318 its product of digits (96), we obtain a palindrome (22222).

It can be divided in two parts, 22 and 318, that multiplied together give a palindrome (6996).

The spelling of 22318 in words is "twenty-two thousand, three hundred eighteen".