22149 has 12 divisors (see below), whose sum is σ = 33696. Its totient is φ = 13992.

The previous prime is 22147. The next prime is 22153. The reversal of 22149 is 94122.

It is not a de Polignac number, because 22149 - 2¹ = 22147 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 154 + ... + 260.

It is an arithmetic number, because the mean of its divisors is an integer number (2808).

2²²¹⁴⁹ is an apocalyptic number.

It is an amenable number.

22149 is a deficient number, since it is larger than the sum of its proper divisors (11547).

22149 is a wasteful number, since it uses less digits than its factorization.

22149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136 (or 133 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 22149 is about 148.8254010577. The cubic root of 22149 is about 28.0835091920.

It can be divided in two parts, 22 and 149, that added together give a palindrome (171).

The spelling of 22149 in words is "twenty-two thousand, one hundred forty-nine".