221444343305 has 8 divisors (see below), whose sum is σ = 266005206792. Its totient is φ = 176974144768.

The previous prime is 221444343299. The next prime is 221444343313. The reversal of 221444343305 is 503343444122.

It can be written as a sum of positive squares in 4 ways, for example, as 40081641616 + 181362701689 = 200204^2 + 425867^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221444343305 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22660862 + ... + 22670631.

It is an arithmetic number, because the mean of its divisors is an integer number (33250650849).

Almost surely, 2^221444343305 is an apocalyptic number.

It is an amenable number.

221444343305 is a deficient number, since it is larger than the sum of its proper divisors (44560863487).

221444343305 is an equidigital number, since it uses as much as digits as its factorization.

221444343305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45332475.

The product of its (nonzero) digits is 138240, while the sum is 35.

Adding to 221444343305 its reverse (503343444122), we get a palindrome (724787787427).

The spelling of 221444343305 in words is "two hundred twenty-one billion, four hundred forty-four million, three hundred forty-three thousand, three hundred five".