22118441 has 4 divisors (see below), whose sum is σ = 22128084. Its totient is φ = 22108800.

The previous prime is 22118401. The next prime is 22118449. The reversal of 22118441 is 14481122.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 14440000 + 7678441 = 3800^2 + 2771^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22118441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22118449) 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, 821 + ... + 6701.

It is an arithmetic number, because the mean of its divisors is an integer number (5532021).

Almost surely, 2^22118441 is an apocalyptic number.

It is an amenable number.

22118441 is a deficient number, since it is larger than the sum of its proper divisors (9643).

22118441 is an equidigital number, since it uses as much as digits as its factorization.

22118441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9642.

The product of its digits is 512, while the sum is 23.

The square root of 22118441 is about 4703.0246650427. The cubic root of 22118441 is about 280.7058763127.

Adding to 22118441 its reverse (14481122), we get a palindrome (36599563).

The spelling of 22118441 in words is "twenty-two million, one hundred eighteen thousand, four hundred forty-one".