22345 has 8 divisors (see below), whose sum is σ = 27720. Its totient is φ = 17280.

The previous prime is 22343. The next prime is 22349. The reversal of 22345 is 54322.

It can be written as a sum of positive squares in 4 ways, for example, as 441 + 21904 = 21^2 + 148^2 .

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

It is not a de Polignac number, because 22345 - 2¹ = 22343 is a prime.

It is a plaindrome in base 9 and base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151 + ... + 259.

It is an arithmetic number, because the mean of its divisors is an integer number (3465).

2²²³⁴⁵ is an apocalyptic number.

It is an amenable number.

22345 is a deficient number, since it is larger than the sum of its proper divisors (5375).

22345 is a wasteful number, since it uses less digits than its factorization.

22345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155.

The product of its digits is 240, while the sum is 16.

The square root of 22345 is about 149.4824404403. The cubic root of 22345 is about 28.1661045058.

Adding to 22345 its reverse (54322), we get a palindrome (76667).

The spelling of 22345 in words is "twenty-two thousand, three hundred forty-five".