4544431221 has 64 divisors (see below), whose sum is σ = 6903300096. Its totient is φ = 2635416000.

The previous prime is 4544431217. The next prime is 4544431237. The reversal of 4544431221 is 1221344454.

It is not a de Polignac number, because 4544431221 - 2² = 4544431217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4544431321) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 27212080 + ... + 27212246.

It is an arithmetic number, because the mean of its divisors is an integer number (107864064).

Almost surely, 2^4544431221 is an apocalyptic number.

It is an amenable number.

4544431221 is a deficient number, since it is larger than the sum of its proper divisors (2358868875).

4544431221 is a wasteful number, since it uses less digits than its factorization.

4544431221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502.

The product of its digits is 15360, while the sum is 30.

The square root of 4544431221 is about 67412.3966418640. The cubic root of 4544431221 is about 1656.3794927002.

Adding to 4544431221 its reverse (1221344454), we get a palindrome (5765775675).

The spelling of 4544431221 in words is "four billion, five hundred forty-four million, four hundred thirty-one thousand, two hundred twenty-one".