13523143 has 4 divisors (see below), whose sum is σ = 14318640. Its totient is φ = 12727648.

The previous prime is 13523129. The next prime is 13523173. The reversal of 13523143 is 34132531.

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 13523143 - 2²¹ = 11425991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13523123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 397723 + ... + 397756.

It is an arithmetic number, because the mean of its divisors is an integer number (3579660).

Almost surely, 2^13523143 is an apocalyptic number.

13523143 is a deficient number, since it is larger than the sum of its proper divisors (795497).

13523143 is an equidigital number, since it uses as much as digits as its factorization.

13523143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795496.

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

The square root of 13523143 is about 3677.3826289904. The cubic root of 13523143 is about 238.2461439052.

Adding to 13523143 its reverse (34132531), we get a palindrome (47655674).

The spelling of 13523143 in words is "thirteen million, five hundred twenty-three thousand, one hundred forty-three".