13522523221 has 2 divisors, whose sum is σ = 13522523222. Its totient is φ = 13522523220.

The previous prime is 13522523159. The next prime is 13522523243. The reversal of 13522523221 is 12232522531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11048952996 + 2473570225 = 105114^2 + 49735^2 .

It is a cyclic number.

It is not a de Polignac number, because 13522523221 - 2⁷ = 13522523093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13522523221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13522523251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6761261610 + 6761261611.

It is an arithmetic number, because the mean of its divisors is an integer number (6761261611).

Almost surely, 2^13522523221 is an apocalyptic number.

It is an amenable number.

13522523221 is a deficient number, since it is larger than the sum of its proper divisors (1).

13522523221 is an equidigital number, since it uses as much as digits as its factorization.

13522523221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7200, while the sum is 28.

The spelling of 13522523221 in words is "thirteen billion, five hundred twenty-two million, five hundred twenty-three thousand, two hundred twenty-one".