4431221305 has 16 divisors (see below), whose sum is σ = 6085497600. Its totient is φ = 3034354752.

The previous prime is 4431221303. The next prime is 4431221317. The reversal of 4431221305 is 5031221344.

It is a cyclic number.

It is not a de Polignac number, because 4431221305 - 2¹ = 4431221303 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4431221305.

It is not an unprimeable number, because it can be changed into a prime (4431221303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61630 + ... + 112519.

It is an arithmetic number, because the mean of its divisors is an integer number (380343600).

Almost surely, 2^4431221305 is an apocalyptic number.

It is an amenable number.

4431221305 is a deficient number, since it is larger than the sum of its proper divisors (1654276295).

4431221305 is a wasteful number, since it uses less digits than its factorization.

4431221305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174888.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 4431221305 is about 66567.4192454537. The cubic root of 4431221305 is about 1642.5092098234.

Adding to 4431221305 its reverse (5031221344), we get a palindrome (9462442649).

The spelling of 4431221305 in words is "four billion, four hundred thirty-one million, two hundred twenty-one thousand, three hundred five".