22442 has 12 divisors (see below), whose sum is σ = 39330.
Its totient is φ = 9576.
The previous prime is 22441. The next prime is 22447. The reversal of 22442 is 24422.
It is a happy number.
It can be written as a sum of positive squares in only one way, i.e., 14161 + 8281 = 119^2 + 91^2
It is a Harshad number since it is a multiple of its sum of digits (14).
It is an Ulam number.
It is a plaindrome in base 16.
It is not an unprimeable number, because it can be changed into a prime (22441) 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, 17 + ... + 212.
222442 is an apocalyptic number.
22442 is a deficient number, since it is larger than the sum of its proper divisors (16888).
22442 is a wasteful number, since it uses less digits than its factorization.
22442 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 245 (or 238 counting only the distinct ones).
The product of its digits is 128, while the sum is 14.
The square root of 22442 is about 149.8065419132.
The cubic root of 22442 is about 28.2068021751.
Adding to 22442 its reverse (24422), we get a palindrome (46864).
It can be divided in two parts, 22 and 442, that added together give a palindrome (464).
The spelling of 22442 in words is "twenty-two thousand, four hundred forty-two", and thus it is an iban number.