224565 has 16 divisors (see below), whose sum is σ = 392256. Its totient is φ = 108800.

The previous prime is 224563. The next prime is 224569. The reversal of 224565 is 565422.

It is not a de Polignac number, because 224565 - 2¹ = 224563 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (224563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 516 + ... + 845.

It is an arithmetic number, because the mean of its divisors is an integer number (24516).

2²²⁴⁵⁶⁵ is an apocalyptic number.

It is an amenable number.

224565 is a deficient number, since it is larger than the sum of its proper divisors (167691).

224565 is a wasteful number, since it uses less digits than its factorization.

224565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1380.

The product of its digits is 2400, while the sum is 24.

The square root of 224565 is about 473.8828969271. The cubic root of 224565 is about 60.7827982558.

Adding to 224565 its reverse (565422), we get a palindrome (789987).

The spelling of 224565 in words is "two hundred twenty-four thousand, five hundred sixty-five".