22221152447 has 4 divisors (see below), whose sum is σ = 23930471880. Its totient is φ = 20511833016.

The previous prime is 22221152381. The next prime is 22221152467. The reversal of 22221152447 is 74425112222.

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

It is a cyclic number.

It is not a de Polignac number, because 22221152447 - 2¹² = 22221148351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22221152467) 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, 854659697 + ... + 854659722.

It is an arithmetic number, because the mean of its divisors is an integer number (5982617970).

Almost surely, 2^22221152447 is an apocalyptic number.

22221152447 is a deficient number, since it is larger than the sum of its proper divisors (1709319433).

22221152447 is a wasteful number, since it uses less digits than its factorization.

22221152447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1709319432.

The product of its digits is 17920, while the sum is 32.

Adding to 22221152447 its reverse (74425112222), we get a palindrome (96646264669).

The spelling of 22221152447 in words is "twenty-two billion, two hundred twenty-one million, one hundred fifty-two thousand, four hundred forty-seven".