22543032221 has 2 divisors, whose sum is σ = 22543032222. Its totient is φ = 22543032220.

The previous prime is 22543032203. The next prime is 22543032241. The reversal of 22543032221 is 12223034522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18874912996 + 3668119225 = 137386^2 + 60565^2 .

It is a cyclic number.

It is not a de Polignac number, because 22543032221 - 2³⁴ = 5363163037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22543032241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11271516110 + 11271516111.

It is an arithmetic number, because the mean of its divisors is an integer number (11271516111).

Almost surely, 2^22543032221 is an apocalyptic number.

It is an amenable number.

22543032221 is a deficient number, since it is larger than the sum of its proper divisors (1).

22543032221 is an equidigital number, since it uses as much as digits as its factorization.

22543032221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 26.

Adding to 22543032221 its reverse (12223034522), we get a palindrome (34766066743).

The spelling of 22543032221 in words is "twenty-two billion, five hundred forty-three million, thirty-two thousand, two hundred twenty-one".