22465 has 4 divisors (see below), whose sum is σ = 26964. Its totient is φ = 17968.

The previous prime is 22453. The next prime is 22469. The reversal of 22465 is 56422.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56422 = 2 ⋅28211.

It can be written as a sum of positive squares in 2 ways, for example, as 17424 + 5041 = 132^2 + 71^2 .

It is a cyclic number.

It is not a de Polignac number, because 22465 - 2⁵ = 22433 is a prime.

It is a d-powerful number, because it can be written as 2¹² + 2¹⁴ + 4³ + 6⁴ + 5⁴ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22469) 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, 2242 + ... + 2251.

It is an arithmetic number, because the mean of its divisors is an integer number (6741).

2²²⁴⁶⁵ is an apocalyptic number.

It is an amenable number.

22465 is a deficient number, since it is larger than the sum of its proper divisors (4499).

22465 is an equidigital number, since it uses as much as digits as its factorization.

22465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4498.

The product of its digits is 480, while the sum is 19.

The square root of 22465 is about 149.8832879276. The cubic root of 22465 is about 28.2164349314.

Adding to 22465 its reverse (56422), we get a palindrome (78887).

It can be divided in two parts, 224 and 65, that added together give a square (289 = 17²).

The spelling of 22465 in words is "twenty-two thousand, four hundred sixty-five".