22145489 has 4 divisors (see below), whose sum is σ = 22158180. Its totient is φ = 22132800.

The previous prime is 22145477. The next prime is 22145503. The reversal of 22145489 is 98454122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19228225 + 2917264 = 4385^2 + 1708^2 .

It is a cyclic number.

It is not a de Polignac number, because 22145489 - 2²⁰ = 21096913 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (22145429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3212 + ... + 7389.

It is an arithmetic number, because the mean of its divisors is an integer number (5539545).

Almost surely, 2^22145489 is an apocalyptic number.

It is an amenable number.

22145489 is a deficient number, since it is larger than the sum of its proper divisors (12691).

22145489 is a wasteful number, since it uses less digits than its factorization.

22145489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12690.

The product of its digits is 23040, while the sum is 35.

The square root of 22145489 is about 4705.8993826898. The cubic root of 22145489 is about 280.8202520614.

The spelling of 22145489 in words is "twenty-two million, one hundred forty-five thousand, four hundred eighty-nine".