13521005443 has 8 divisors (see below), whose sum is σ = 15258815280. Its totient is φ = 11867966880.

The previous prime is 13521005419. The next prime is 13521005513. The reversal of 13521005443 is 34450012531.

13521005443 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-13521005443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13521005143) 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 in 7 ways as a sum of consecutive naturals, for example, 21192480 + ... + 21193117.

It is an arithmetic number, because the mean of its divisors is an integer number (1907351910).

Almost surely, 2^13521005443 is an apocalyptic number.

13521005443 is a deficient number, since it is larger than the sum of its proper divisors (1737809837).

13521005443 is a wasteful number, since it uses less digits than its factorization.

13521005443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42385637.

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

Adding to 13521005443 its reverse (34450012531), we get a palindrome (47971017974).

The spelling of 13521005443 in words is "thirteen billion, five hundred twenty-one million, five thousand, four hundred forty-three".