22265 has 8 divisors (see below), whose sum is σ = 27528. Its totient is φ = 17280.

The previous prime is 22259. The next prime is 22271. The reversal of 22265 is 56222.

It is an interprime number because it is at equal distance from previous prime (22259) and next prime (22271).

It can be written as a sum of positive squares in 4 ways, for example, as 64 + 22201 = 8^2 + 149^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22265 - 2¹² = 18169 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 9.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 269 + ... + 341.

It is an arithmetic number, because the mean of its divisors is an integer number (3441).

2²²²⁶⁵ is an apocalyptic number.

22265 is the 122-nd pentagonal number.

It is an amenable number.

22265 is a deficient number, since it is larger than the sum of its proper divisors (5263).

22265 is an equidigital number, since it uses as much as digits as its factorization.

22265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139.

The product of its digits is 240, while the sum is 17.

The square root of 22265 is about 149.2146105447. The cubic root of 22265 is about 28.1324507009.

Adding to 22265 its reverse (56222), we get a palindrome (78487).

The spelling of 22265 in words is "twenty-two thousand, two hundred sixty-five".