221444321324431 has 8 divisors (see below), whose sum is σ = 225280709940384. Its totient is φ = 217627862000640.

The previous prime is 221444321324423. The next prime is 221444321324441. The reversal of 221444321324431 is 134423123444122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221444321324431 - 2³ = 221444321324423 is a prime.

It is a super-2 number, since 2×221444321324431² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221444321324441) 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 7 ways as a sum of consecutive naturals, for example, 4982300626 + ... + 4982345071.

It is an arithmetic number, because the mean of its divisors is an integer number (28160088742548).

Almost surely, 2^{221444321324431} is an apocalyptic number.

221444321324431 is a deficient number, since it is larger than the sum of its proper divisors (3836388615953).

221444321324431 is an equidigital number, since it uses as much as digits as its factorization.

221444321324431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9964646081.

The product of its digits is 442368, while the sum is 40.

Adding to 221444321324431 its reverse (134423123444122), we get a palindrome (355867444768553).

The spelling of 221444321324431 in words is "two hundred twenty-one trillion, four hundred forty-four billion, three hundred twenty-one million, three hundred twenty-four thousand, four hundred thirty-one".