21523324222 has 8 divisors (see below), whose sum is σ = 33984196200. Its totient is φ = 10195258824.

The previous prime is 21523324187. The next prime is 21523324223. The reversal of 21523324222 is 22242332512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21523324223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 283201597 + ... + 283201672.

It is an arithmetic number, because the mean of its divisors is an integer number (4248024525).

Almost surely, 2^21523324222 is an apocalyptic number.

21523324222 is a deficient number, since it is larger than the sum of its proper divisors (12460871978).

21523324222 is a wasteful number, since it uses less digits than its factorization.

21523324222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 566403290.

The product of its digits is 11520, while the sum is 28.

Adding to 21523324222 its reverse (22242332512), we get a palindrome (43765656734).

The spelling of 21523324222 in words is "twenty-one billion, five hundred twenty-three million, three hundred twenty-four thousand, two hundred twenty-two".