144441221 has 2 divisors, whose sum is σ = 144441222. Its totient is φ = 144441220.

The previous prime is 144441217. The next prime is 144441247. The reversal of 144441221 is 122144441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97792321 + 46648900 = 9889^2 + 6830^2 .

It is a cyclic number.

It is not a de Polignac number, because 144441221 - 2² = 144441217 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144441251) 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 as a sum of consecutive naturals, namely, 72220610 + 72220611.

It is an arithmetic number, because the mean of its divisors is an integer number (72220611).

Almost surely, 2^144441221 is an apocalyptic number.

It is an amenable number.

144441221 is a deficient number, since it is larger than the sum of its proper divisors (1).

144441221 is an equidigital number, since it uses as much as digits as its factorization.

144441221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1024, while the sum is 23.

The square root of 144441221 is about 12018.3701474035. The cubic root of 144441221 is about 524.6830691830.

Adding to 144441221 its reverse (122144441), we get a palindrome (266585662).

The spelling of 144441221 in words is "one hundred forty-four million, four hundred forty-one thousand, two hundred twenty-one".