13521343 has 4 divisors (see below), whose sum is σ = 14750568. Its totient is φ = 12292120.

The previous prime is 13521329. The next prime is 13521359. The reversal of 13521343 is 34312531.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13521343 - 2¹³ = 13513151 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13521323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 614596 + ... + 614617.

It is an arithmetic number, because the mean of its divisors is an integer number (3687642).

Almost surely, 2^13521343 is an apocalyptic number.

13521343 is a deficient number, since it is larger than the sum of its proper divisors (1229225).

13521343 is a wasteful number, since it uses less digits than its factorization.

13521343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1229224.

The product of its digits is 1080, while the sum is 22.

The square root of 13521343 is about 3677.1378815595. The cubic root of 13521343 is about 238.2355728398.

Adding to 13521343 its reverse (34312531), we get a palindrome (47833874).

The spelling of 13521343 in words is "thirteen million, five hundred twenty-one thousand, three hundred forty-three".