13223231211535 has 4 divisors (see below), whose sum is σ = 15867877453848. Its totient is φ = 10578584969224.

The previous prime is 13223231211481. The next prime is 13223231211551. The reversal of 13223231211535 is 53511213232231.

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 13223231211535 - 2²⁹ = 13222694340623 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13223231211535.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1322323121149 + ... + 1322323121158.

It is an arithmetic number, because the mean of its divisors is an integer number (3966969363462).

Almost surely, 2^{13223231211535} is an apocalyptic number.

13223231211535 is a deficient number, since it is larger than the sum of its proper divisors (2644646242313).

13223231211535 is an equidigital number, since it uses as much as digits as its factorization.

13223231211535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2644646242312.

The product of its digits is 32400, while the sum is 34.

Adding to 13223231211535 its reverse (53511213232231), we get a palindrome (66734444443766).

The spelling of 13223231211535 in words is "thirteen trillion, two hundred twenty-three billion, two hundred thirty-one million, two hundred eleven thousand, five hundred thirty-five".