13081543 has 4 divisors (see below), whose sum is σ = 13091848. Its totient is φ = 13071240.

The previous prime is 13081507. The next prime is 13081559. The reversal of 13081543 is 34518031.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 13081543 - 2⁹ = 13081031 is a prime.

It is a super-2 number, since 2×13081543² = 342253534521698, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13081573) 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, 2928 + ... + 5893.

It is an arithmetic number, because the mean of its divisors is an integer number (3272962).

Almost surely, 2^13081543 is an apocalyptic number.

13081543 is a deficient number, since it is larger than the sum of its proper divisors (10305).

13081543 is an equidigital number, since it uses as much as digits as its factorization.

13081543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10304.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 13081543 is about 3616.8415779517. The cubic root of 13081543 is about 235.6240723297.

Adding to 13081543 its reverse (34518031), we get a palindrome (47599574).

The spelling of 13081543 in words is "thirteen million, eighty-one thousand, five hundred forty-three".