218432272105831 has 16 divisors (see below), whose sum is σ = 252658903601664. Its totient is φ = 184961402122464.

The previous prime is 218432272105811. The next prime is 218432272105877. The reversal of 218432272105831 is 138501272234812.

It is a cyclic number.

It is not a de Polignac number, because 218432272105831 - 2²¹ = 218432270008679 is a prime.

It is a super-2 number, since 2×218432272105831² (a number of 29 digits) contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 427756 + ... + 20905681.

It is an arithmetic number, because the mean of its divisors is an integer number (15791181475104).

Almost surely, 2^{218432272105831} is an apocalyptic number.

218432272105831 is a deficient number, since it is larger than the sum of its proper divisors (34226631495833).

218432272105831 is a wasteful number, since it uses less digits than its factorization.

218432272105831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21351150.

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

The spelling of 218432272105831 in words is "two hundred eighteen trillion, four hundred thirty-two billion, two hundred seventy-two million, one hundred five thousand, eight hundred thirty-one".