13523431443 has 16 divisors (see below), whose sum is σ = 18240300960. Its totient is φ = 8911328256.

The previous prime is 13523431433. The next prime is 13523431451. The reversal of 13523431443 is 34413432531.

It is not a de Polignac number, because 13523431443 - 2⁶ = 13523431379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13523431433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 202773 + ... + 261081.

It is an arithmetic number, because the mean of its divisors is an integer number (1140018810).

Almost surely, 2^13523431443 is an apocalyptic number.

13523431443 is a deficient number, since it is larger than the sum of its proper divisors (4716869517).

13523431443 is an equidigital number, since it uses as much as digits as its factorization.

13523431443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59206.

The product of its digits is 51840, while the sum is 33.

Adding to 13523431443 its reverse (34413432531), we get a palindrome (47936863974).

The spelling of 13523431443 in words is "thirteen billion, five hundred twenty-three million, four hundred thirty-one thousand, four hundred forty-three".