13115543 has 8 divisors (see below), whose sum is σ = 15641088. Its totient is φ = 10752984.

The previous prime is 13115537. The next prime is 13115563. The reversal of 13115543 is 34551131.

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

It is a cyclic number.

It is not a de Polignac number, because 13115543 - 2⁴ = 13115527 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13115513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40571 + ... + 40892.

It is an arithmetic number, because the mean of its divisors is an integer number (1955136).

Almost surely, 2^13115543 is an apocalyptic number.

13115543 is a deficient number, since it is larger than the sum of its proper divisors (2525545).

13115543 is an equidigital number, since it uses as much as digits as its factorization.

13115543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81493.

The product of its digits is 900, while the sum is 23.

The square root of 13115543 is about 3621.5387613555. The cubic root of 13115543 is about 235.8280311405.

Adding to 13115543 its reverse (34551131), we get a palindrome (47666674).

The spelling of 13115543 in words is "thirteen million, one hundred fifteen thousand, five hundred forty-three".