22232523221 has 2 divisors, whose sum is σ = 22232523222. Its totient is φ = 22232523220.

The previous prime is 22232523191. The next prime is 22232523233. The reversal of 22232523221 is 12232523222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22192060900 + 40462321 = 148970^2 + 6361^2 .

It is a cyclic number.

It is not a de Polignac number, because 22232523221 - 2³⁴ = 5052654037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22232523821) 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 as a sum of consecutive naturals, namely, 11116261610 + 11116261611.

It is an arithmetic number, because the mean of its divisors is an integer number (11116261611).

Almost surely, 2^22232523221 is an apocalyptic number.

It is an amenable number.

22232523221 is a deficient number, since it is larger than the sum of its proper divisors (1).

22232523221 is an equidigital number, since it uses as much as digits as its factorization.

22232523221 is an odious number, because the sum of its binary digits is odd.

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

Subtracting from 22232523221 its reverse (12232523222), we obtain a palindrome (9999999999).

The spelling of 22232523221 in words is "twenty-two billion, two hundred thirty-two million, five hundred twenty-three thousand, two hundred twenty-one".