22353323221 has 4 divisors (see below), whose sum is σ = 23124127500. Its totient is φ = 21582518944.

The previous prime is 22353323197. The next prime is 22353323231. The reversal of 22353323221 is 12232335322.

It is a happy number.

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 16670424996 + 5682898225 = 129114^2 + 75385^2 .

It is a cyclic number.

It is not a de Polignac number, because 22353323221 - 2⁵ = 22353323189 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 22353323221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22353323231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 385402096 + ... + 385402153.

It is an arithmetic number, because the mean of its divisors is an integer number (5781031875).

Almost surely, 2^22353323221 is an apocalyptic number.

It is an amenable number.

22353323221 is a deficient number, since it is larger than the sum of its proper divisors (770804279).

22353323221 is an equidigital number, since it uses as much as digits as its factorization.

22353323221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 770804278.

The product of its digits is 12960, while the sum is 28.

Adding to 22353323221 its reverse (12232335322), we get a palindrome (34585658543).

The spelling of 22353323221 in words is "twenty-two billion, three hundred fifty-three million, three hundred twenty-three thousand, two hundred twenty-one".