144333221 has 2 divisors, whose sum is σ = 144333222. Its totient is φ = 144333220.

The previous prime is 144333181. The next prime is 144333223. The reversal of 144333221 is 122333441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130188100 + 14145121 = 11410^2 + 3761^2 .

It is an emirp because it is prime and its reverse (122333441) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 144333221 - 2⁶ = 144333157 is a prime.

Together with 144333223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144333223) 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 as a sum of consecutive naturals, namely, 72166610 + 72166611.

It is an arithmetic number, because the mean of its divisors is an integer number (72166611).

Almost surely, 2^144333221 is an apocalyptic number.

It is an amenable number.

144333221 is a deficient number, since it is larger than the sum of its proper divisors (1).

144333221 is an equidigital number, since it uses as much as digits as its factorization.

144333221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 23.

The square root of 144333221 is about 12013.8761854782. The cubic root of 144333221 is about 524.5522664936.

Adding to 144333221 its reverse (122333441), we get a palindrome (266666662).

The spelling of 144333221 in words is "one hundred forty-four million, three hundred thirty-three thousand, two hundred twenty-one".