221244444143 has 4 divisors (see below), whose sum is σ = 228381361728. Its totient is φ = 214107526560.

The previous prime is 221244444137. The next prime is 221244444163. The reversal of 221244444143 is 341444442122.

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 221244444143 - 2²⁴ = 221227666927 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 (221244444163) 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, 3568458746 + ... + 3568458807.

It is an arithmetic number, because the mean of its divisors is an integer number (57095340432).

Almost surely, 2^221244444143 is an apocalyptic number.

221244444143 is a deficient number, since it is larger than the sum of its proper divisors (7136917585).

221244444143 is an equidigital number, since it uses as much as digits as its factorization.

221244444143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7136917584.

The product of its digits is 98304, while the sum is 35.

Adding to 221244444143 its reverse (341444442122), we get a palindrome (562688886265).

The spelling of 221244444143 in words is "two hundred twenty-one billion, two hundred forty-four million, four hundred forty-four thousand, one hundred forty-three".