144303221 has 2 divisors, whose sum is σ = 144303222. Its totient is φ = 144303220.

The previous prime is 144303179. The next prime is 144303239. The reversal of 144303221 is 122303441.

144303221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116856100 + 27447121 = 10810^2 + 5239^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144303221 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 144303193 and 144303202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144303121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72151610 + 72151611.

It is an arithmetic number, because the mean of its divisors is an integer number (72151611).

Almost surely, 2^144303221 is an apocalyptic number.

It is an amenable number.

144303221 is a deficient number, since it is larger than the sum of its proper divisors (1).

144303221 is an equidigital number, since it uses as much as digits as its factorization.

144303221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 144303221 is about 12012.6275643591. The cubic root of 144303221 is about 524.5159208339.

Adding to 144303221 its reverse (122303441), we get a palindrome (266606662).

The spelling of 144303221 in words is "one hundred forty-four million, three hundred three thousand, two hundred twenty-one".