22145 has 8 divisors (see below), whose sum is σ = 27456. Its totient is φ = 17136.

The previous prime is 22133. The next prime is 22147. The reversal of 22145 is 54122.

22145 is an esthetic number in base 3, because in such base its adjacent digits differ by 1.

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 22145 - 2⁴ = 22129 is a prime.

It is a Duffinian number.

It is a plaindrome in base 9.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 22145.

It is not an unprimeable number, because it can be changed into a prime (22147) 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, 164 + ... + 266.

It is an arithmetic number, because the mean of its divisors is an integer number (3432).

2²²¹⁴⁵ is an apocalyptic number.

It is an amenable number.

22145 is a deficient number, since it is larger than the sum of its proper divisors (5311).

22145 is a wasteful number, since it uses less digits than its factorization.

22145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151.

The product of its digits is 80, while the sum is 14.

The square root of 22145 is about 148.8119618848. The cubic root of 22145 is about 28.0818185092.

Adding to 22145 its reverse (54122), we get a palindrome (76267).

The spelling of 22145 in words is "twenty-two thousand, one hundred forty-five".