22144817 has 4 divisors (see below), whose sum is σ = 22306596. Its totient is φ = 21983040.

The previous prime is 22144813. The next prime is 22144841. The reversal of 22144817 is 71844122.

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 10523536 + 11621281 = 3244^2 + 3409^2 .

It is a cyclic number.

It is not a de Polignac number, because 22144817 - 2² = 22144813 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22144817.

It is not an unprimeable number, because it can be changed into a prime (22144813) 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, 80684 + ... + 80957.

It is an arithmetic number, because the mean of its divisors is an integer number (5576649).

Almost surely, 2^22144817 is an apocalyptic number.

It is an amenable number.

22144817 is a deficient number, since it is larger than the sum of its proper divisors (161779).

22144817 is a wasteful number, since it uses less digits than its factorization.

22144817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161778.

The product of its digits is 3584, while the sum is 29.

The square root of 22144817 is about 4705.8279824065. The cubic root of 22144817 is about 280.8174115563.

Adding to 22144817 its reverse (71844122), we get a palindrome (93988939).

The spelling of 22144817 in words is "twenty-two million, one hundred forty-four thousand, eight hundred seventeen".