22043334521 has 4 divisors (see below), whose sum is σ = 23738975652. Its totient is φ = 20347693392.

The previous prime is 22043334457. The next prime is 22043334553. The reversal of 22043334521 is 12543334022.

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 4334378896 + 17708955625 = 65836^2 + 133075^2 .

It is not a de Polignac number, because 22043334521 - 2⁶ = 22043334457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22043334221) 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, 847820546 + ... + 847820571.

It is an arithmetic number, because the mean of its divisors is an integer number (5934743913).

Almost surely, 2^22043334521 is an apocalyptic number.

It is an amenable number.

22043334521 is a deficient number, since it is larger than the sum of its proper divisors (1695641131).

22043334521 is a wasteful number, since it uses less digits than its factorization.

22043334521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1695641130.

The product of its (nonzero) digits is 17280, while the sum is 29.

Adding to 22043334521 its reverse (12543334022), we get a palindrome (34586668543).

The spelling of 22043334521 in words is "twenty-two billion, forty-three million, three hundred thirty-four thousand, five hundred twenty-one".