22645 has 8 divisors (see below), whose sum is σ = 31104. Its totient is φ = 15504.

The previous prime is 22643. The next prime is 22651. The reversal of 22645 is 54622.

22645 = 43² + 44² + ... + 52².

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

It is a cyclic number.

It is not a de Polignac number, because 22645 - 2¹ = 22643 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22643) 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, 289 + ... + 358.

It is an arithmetic number, because the mean of its divisors is an integer number (3888).

2²²⁶⁴⁵ is an apocalyptic number.

It is an amenable number.

22645 is a deficient number, since it is larger than the sum of its proper divisors (8459).

22645 is an equidigital number, since it uses as much as digits as its factorization.

22645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 659.

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

The square root of 22645 is about 150.4825571287. The cubic root of 22645 is about 28.2915956015.

The spelling of 22645 in words is "twenty-two thousand, six hundred forty-five".