13115433243 has 16 divisors (see below), whose sum is σ = 19079164800. Its totient is φ = 7947842880.

The previous prime is 13115433239. The next prime is 13115433257. The reversal of 13115433243 is 34233451131.

It is a happy number.

It is not a de Polignac number, because 13115433243 - 2² = 13115433239 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13115433243.

It is not an unprimeable number, because it can be changed into a prime (13115433223) 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, 377343 + ... + 410631.

It is an arithmetic number, because the mean of its divisors is an integer number (1192447800).

Almost surely, 2^13115433243 is an apocalyptic number.

13115433243 is a deficient number, since it is larger than the sum of its proper divisors (5963731557).

13115433243 is a wasteful number, since it uses less digits than its factorization.

13115433243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45242.

The product of its digits is 12960, while the sum is 30.

Adding to 13115433243 its reverse (34233451131), we get a palindrome (47348884374).

The spelling of 13115433243 in words is "thirteen billion, one hundred fifteen million, four hundred thirty-three thousand, two hundred forty-three".