144203221 has 2 divisors, whose sum is σ = 144203222. Its totient is φ = 144203220.

The previous prime is 144203219. The next prime is 144203233. The reversal of 144203221 is 122302441.

144203221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99500625 + 44702596 = 9975^2 + 6686^2 .

It is a cyclic number.

It is not a de Polignac number, because 144203221 - 2¹ = 144203219 is a prime.

Together with 144203219, 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 (144203291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72101610 + 72101611.

It is an arithmetic number, because the mean of its divisors is an integer number (72101611).

Almost surely, 2^144203221 is an apocalyptic number.

It is an amenable number.

144203221 is a deficient number, since it is larger than the sum of its proper divisors (1).

144203221 is an equidigital number, since it uses as much as digits as its factorization.

144203221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 144203221 is about 12008.4645563036. The cubic root of 144203221 is about 524.3947322412.

Adding to 144203221 its reverse (122302441), we get a palindrome (266505662).

The spelling of 144203221 in words is "one hundred forty-four million, two hundred three thousand, two hundred twenty-one".