144345221 has 2 divisors, whose sum is σ = 144345222. Its totient is φ = 144345220.

The previous prime is 144345203. The next prime is 144345239. The reversal of 144345221 is 122543441.

It is a balanced prime because it is at equal distance from previous prime (144345203) and next prime (144345239).

It can be written as a sum of positive squares in only one way, i.e., 144336196 + 9025 = 12014^2 + 95^2 .

It is a cyclic number.

It is not a de Polignac number, because 144345221 - 2¹⁴ = 144328837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144345241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72172610 + 72172611.

It is an arithmetic number, because the mean of its divisors is an integer number (72172611).

Almost surely, 2^144345221 is an apocalyptic number.

It is an amenable number.

144345221 is a deficient number, since it is larger than the sum of its proper divisors (1).

144345221 is an equidigital number, since it uses as much as digits as its factorization.

144345221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3840, while the sum is 26.

The square root of 144345221 is about 12014.3755975914. The cubic root of 144345221 is about 524.5668033473.

Adding to 144345221 its reverse (122543441), we get a palindrome (266888662).

It can be divided in two parts, 1443 and 45221, that added together give a palindrome (46664).

The spelling of 144345221 in words is "one hundred forty-four million, three hundred forty-five thousand, two hundred twenty-one".