22545 has 16 divisors (see below), whose sum is σ = 40320.
Its totient is φ = 11952.
The previous prime is 22543. The next prime is 22549. The reversal of 22545 is 54522.
It is not a de Polignac number, because 22545 - 21 = 22543 is a prime.
It is not an unprimeable number, because it can be changed into a prime (22541) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (5) of ones.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52 + ... + 218.
It is an arithmetic number, because the mean of its divisors is an integer number (2520).
222545 is an apocalyptic number.
It is an amenable number.
22545 is a deficient number, since it is larger than the sum of its proper divisors (17775).
22545 is a wasteful number, since it uses less digits than its factorization.
22545 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 181 (or 175 counting only the distinct ones).
The product of its digits is 400, while the sum is 18.
The square root of 22545 is about 150.1499250749.
The cubic root of 22545 is about 28.2498890538.
The spelling of 22545 in words is "twenty-two thousand, five hundred forty-five".