13531113215 has 4 divisors (see below), whose sum is σ = 16237335864. Its totient is φ = 10824890568.

The previous prime is 13531113203. The next prime is 13531113217. The reversal of 13531113215 is 51231113531.

It is a happy number.

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 13531113215 - 2¹⁸ = 13530851071 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 (13531113217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1353111317 + ... + 1353111326.

It is an arithmetic number, because the mean of its divisors is an integer number (4059333966).

Almost surely, 2^13531113215 is an apocalyptic number.

13531113215 is a deficient number, since it is larger than the sum of its proper divisors (2706222649).

13531113215 is an equidigital number, since it uses as much as digits as its factorization.

13531113215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2706222648.

The product of its digits is 1350, while the sum is 26.

Adding to 13531113215 its reverse (51231113531), we get a palindrome (64762226746).

The spelling of 13531113215 in words is "thirteen billion, five hundred thirty-one million, one hundred thirteen thousand, two hundred fifteen".