221434044443 has 4 divisors (see below), whose sum is σ = 222141501768. Its totient is φ = 220726587120.

The previous prime is 221434044439. The next prime is 221434044451. The reversal of 221434044443 is 344440434122.

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 221434044443 - 2² = 221434044439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221434014443) 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, 353728193 + ... + 353728818.

It is an arithmetic number, because the mean of its divisors is an integer number (55535375442).

Almost surely, 2^221434044443 is an apocalyptic number.

221434044443 is a deficient number, since it is larger than the sum of its proper divisors (707457325).

221434044443 is an equidigital number, since it uses as much as digits as its factorization.

221434044443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707457324.

The product of its (nonzero) digits is 147456, while the sum is 35.

Adding to 221434044443 its reverse (344440434122), we get a palindrome (565874478565).

The spelling of 221434044443 in words is "two hundred twenty-one billion, four hundred thirty-four million, forty-four thousand, four hundred forty-three".