22144489 has 4 divisors (see below), whose sum is σ = 23447124. Its totient is φ = 20841856.

The previous prime is 22144471. The next prime is 22144511. The reversal of 22144489 is 98444122.

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 10530025 + 11614464 = 3245^2 + 3408^2 .

It is a cyclic number.

It is not a de Polignac number, because 22144489 - 2⁷ = 22144361 is a prime.

It is a super-2 number, since 2×22144489² = 980756786142242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22144439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 651292 + ... + 651325.

It is an arithmetic number, because the mean of its divisors is an integer number (5861781).

Almost surely, 2^22144489 is an apocalyptic number.

It is an amenable number.

22144489 is a deficient number, since it is larger than the sum of its proper divisors (1302635).

22144489 is a wasteful number, since it uses less digits than its factorization.

22144489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1302634.

The product of its digits is 18432, while the sum is 34.

The square root of 22144489 is about 4705.7931318748. The cubic root of 22144489 is about 280.8160250985.

The spelling of 22144489 in words is "twenty-two million, one hundred forty-four thousand, four hundred eighty-nine".