221224342443 has 16 divisors (see below), whose sum is σ = 317707353600. Its totient is φ = 136115819424.

The previous prime is 221224342373. The next prime is 221224342453. The reversal of 221224342443 is 344243422122.

It is a happy number.

It is not a de Polignac number, because 221224342443 - 2⁹ = 221224341931 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221224342453) 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 15 ways as a sum of consecutive naturals, for example, 219843 + ... + 700556.

It is an arithmetic number, because the mean of its divisors is an integer number (19856709600).

Almost surely, 2^221224342443 is an apocalyptic number.

221224342443 is a deficient number, since it is larger than the sum of its proper divisors (96483011157).

221224342443 is a wasteful number, since it uses less digits than its factorization.

221224342443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 926578.

The product of its digits is 73728, while the sum is 33.

Adding to 221224342443 its reverse (344243422122), we get a palindrome (565467764565).

The spelling of 221224342443 in words is "two hundred twenty-one billion, two hundred twenty-four million, three hundred forty-two thousand, four hundred forty-three".