21632441522225 has 24 divisors (see below), whose sum is σ = 27075529242720. Its totient is φ = 17143830321920.

The previous prime is 21632441522207. The next prime is 21632441522239. The reversal of 21632441522225 is 52222514423612.

It is not a de Polignac number, because 21632441522225 - 2³⁰ = 21631367780401 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 209141321 + ... + 209244729.

It is an arithmetic number, because the mean of its divisors is an integer number (1128147051780).

Almost surely, 2^{21632441522225} is an apocalyptic number.

21632441522225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21632441522225 is a deficient number, since it is larger than the sum of its proper divisors (5443087720495).

21632441522225 is a wasteful number, since it uses less digits than its factorization.

21632441522225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181729 (or 181724 counting only the distinct ones).

The product of its digits is 460800, while the sum is 41.

Adding to 21632441522225 its reverse (52222514423612), we get a palindrome (73854955945837).

The spelling of 21632441522225 in words is "twenty-one trillion, six hundred thirty-two billion, four hundred forty-one million, five hundred twenty-two thousand, two hundred twenty-five".