22451444443 has 4 divisors (see below), whose sum is σ = 22516146360. Its totient is φ = 22386742528.

The previous prime is 22451444423. The next prime is 22451444539. The reversal of 22451444443 is 34444415422.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34444415422 = 2 ⋅17222207711.

It is a cyclic number.

It is not a de Polignac number, because 22451444443 - 2²⁹ = 21914573531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22451444423) 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, 32350438 + ... + 32351131.

It is an arithmetic number, because the mean of its divisors is an integer number (5629036590).

Almost surely, 2^22451444443 is an apocalyptic number.

22451444443 is a deficient number, since it is larger than the sum of its proper divisors (64701917).

22451444443 is an equidigital number, since it uses as much as digits as its factorization.

22451444443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64701916.

The product of its digits is 245760, while the sum is 37.

Adding to 22451444443 its reverse (34444415422), we get a palindrome (56895859865).

The spelling of 22451444443 in words is "twenty-two billion, four hundred fifty-one million, four hundred forty-four thousand, four hundred forty-three".