22172 has 12 divisors (see below), whose sum is σ = 40656.
Its totient is φ = 10560.
The previous prime is 22171. The next prime is 22189. The reversal of 22172 is 27122.
Adding to 22172 its reverse (27122), we get a palindrome (49294).
Subtracting 22172 from its reverse (27122), we obtain a triangular number (4950 = T99).
It is a hoax number, since the sum of its digits (14) coincides with the sum of the digits of its distinct prime factors.
It is a plaindrome in base 16.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (22171) 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, 29 + ... + 212.
It is an arithmetic number, because the mean of its divisors is an integer number (3388).
222172 is an apocalyptic number.
It is an amenable number.
22172 is a deficient number, since it is larger than the sum of its proper divisors (18484).
22172 is a wasteful number, since it uses less digits than its factorization.
22172 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 268 (or 266 counting only the distinct ones).
The product of its digits is 56, while the sum is 14.
The square root of 22172 is about 148.9026527635.
The cubic root of 22172 is about 28.0932266700.
The spelling of 22172 in words is "twenty-two thousand, one hundred seventy-two", and thus it is an iban number.