21443103303225 has 24 divisors (see below), whose sum is σ = 35723227992672. Its totient is φ = 11349021590400.

The previous prime is 21443103303191. The next prime is 21443103303289. The reversal of 21443103303225 is 52230330134412.

It is not a de Polignac number, because 21443103303225 - 2²³ = 21443094914617 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1091242252 + ... + 1091261901.

It is an arithmetic number, because the mean of its divisors is an integer number (1488467833028).

Almost surely, 2^{21443103303225} is an apocalyptic number.

21443103303225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21443103303225 is a deficient number, since it is larger than the sum of its proper divisors (14280124689447).

21443103303225 is a wasteful number, since it uses less digits than its factorization.

21443103303225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2182504297 (or 2182504292 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 33.

Adding to 21443103303225 its reverse (52230330134412), we get a palindrome (73673433437637).

The spelling of 21443103303225 in words is "twenty-one trillion, four hundred forty-three billion, one hundred three million, three hundred three thousand, two hundred twenty-five".