22197 has 12 divisors (see below), whose sum is σ = 34656. Its totient is φ = 12600.

The previous prime is 22193. The next prime is 22229. The reversal of 22197 is 79122.

It is a happy number.

22197 is nontrivially palindromic in base 2.

It is not a de Polignac number, because 22197 - 2² = 22193 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

22197 is a lucky number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22193) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72 + ... + 222.

It is an arithmetic number, because the mean of its divisors is an integer number (2888).

2²²¹⁹⁷ is an apocalyptic number.

It is an amenable number.

22197 is a deficient number, since it is larger than the sum of its proper divisors (12459).

22197 is a wasteful number, since it uses less digits than its factorization.

22197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168 (or 161 counting only the distinct ones).

The product of its digits is 252, while the sum is 21.

The square root of 22197 is about 148.9865765765. The cubic root of 22197 is about 28.1037815269.

Subtracting from 22197 its product of digits (252), we obtain a triangular number (21945 = T₂₀₉).

It can be divided in two parts, 22 and 197, that multiplied together give a palindrome (4334).

The spelling of 22197 in words is "twenty-two thousand, one hundred ninety-seven".