13871218135 has 4 divisors (see below), whose sum is σ = 16645461768. Its totient is φ = 11096974504.

The previous prime is 13871218133. The next prime is 13871218211. The reversal of 13871218135 is 53181217831.

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 13871218135 - 2¹ = 13871218133 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 (13871218133) by changing a digit.

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, 1387121809 + ... + 1387121818.

It is an arithmetic number, because the mean of its divisors is an integer number (4161365442).

Almost surely, 2^13871218135 is an apocalyptic number.

13871218135 is a deficient number, since it is larger than the sum of its proper divisors (2774243633).

13871218135 is an equidigital number, since it uses as much as digits as its factorization.

13871218135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2774243632.

The product of its digits is 40320, while the sum is 40.

The spelling of 13871218135 in words is "thirteen billion, eight hundred seventy-one million, two hundred eighteen thousand, one hundred thirty-five".