218432272105813 has 4 divisors (see below), whose sum is σ = 218432302268320. Its totient is φ = 218432241943308.

The previous prime is 218432272105811. The next prime is 218432272105877. The reversal of 218432272105813 is 318501272234812.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 218432272105813 - 2¹ = 218432272105811 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 (218432272105811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3037648 + ... + 21120886.

It is an arithmetic number, because the mean of its divisors is an integer number (54608075567080).

Almost surely, 2^{218432272105813} is an apocalyptic number.

It is an amenable number.

218432272105813 is a deficient number, since it is larger than the sum of its proper divisors (30162507).

218432272105813 is a wasteful number, since it uses less digits than its factorization.

218432272105813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30162506.

The product of its (nonzero) digits is 1290240, while the sum is 49.

The spelling of 218432272105813 in words is "two hundred eighteen trillion, four hundred thirty-two billion, two hundred seventy-two million, one hundred five thousand, eight hundred thirteen".