21443545314325 has 12 divisors (see below), whose sum is σ = 26781291130720. Its totient is φ = 17031420160560.

The previous prime is 21443545314311. The next prime is 21443545314343. The reversal of 21443545314325 is 52341354534412.

It is a happy number.

It is not a de Polignac number, because 21443545314325 - 2¹⁷ = 21443545183253 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3085398729 + ... + 3085405678.

Almost surely, 2^{21443545314325} is an apocalyptic number.

21443545314325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21443545314325 is a deficient number, since it is larger than the sum of its proper divisors (5337745816395).

21443545314325 is a wasteful number, since it uses less digits than its factorization.

21443545314325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6170804556 (or 6170804551 counting only the distinct ones).

The product of its digits is 3456000, while the sum is 46.

Adding to 21443545314325 its reverse (52341354534412), we get a palindrome (73784899848737).

The spelling of 21443545314325 in words is "twenty-one trillion, four hundred forty-three billion, five hundred forty-five million, three hundred fourteen thousand, three hundred twenty-five".