22045 has 4 divisors (see below), whose sum is σ = 26460. Its totient is φ = 17632.

The previous prime is 22039. The next prime is 22051. The reversal of 22045 is 54022.

It is a happy number.

22045 is nontrivially palindromic in base 8.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54022 = 2 ⋅27011.

It is an interprime number because it is at equal distance from previous prime (22039) and next prime (22051).

It can be written as a sum of positive squares in 2 ways, for example, as 4356 + 17689 = 66^2 + 133^2 .

It is a cyclic number.

It is not a de Polignac number, because 22045 - 2³ = 22037 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2200 + ... + 2209.

It is an arithmetic number, because the mean of its divisors is an integer number (6615).

2²²⁰⁴⁵ is an apocalyptic number.

It is an amenable number.

22045 is a deficient number, since it is larger than the sum of its proper divisors (4415).

22045 is an equidigital number, since it uses as much as digits as its factorization.

22045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4414.

The product of its (nonzero) digits is 80, while the sum is 13.

The square root of 22045 is about 148.4755872189. The cubic root of 22045 is about 28.0394851089.

Adding to 22045 its reverse (54022), we get a palindrome (76067).

It can be divided in two parts, 2204 and 5, that added together give a square (2209 = 47²).

The spelling of 22045 in words is "twenty-two thousand, forty-five".