144422321 has 4 divisors (see below), whose sum is σ = 144480612. Its totient is φ = 144364032.

The previous prime is 144422281. The next prime is 144422323. The reversal of 144422321 is 123224441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 123224441 = 3539 ⋅34819.

It can be written as a sum of positive squares in 2 ways, for example, as 127938721 + 16483600 = 11311^2 + 4060^2 .

It is a cyclic number.

It is not a de Polignac number, because 144422321 - 2¹⁰ = 144421297 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (144422323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25256 + ... + 30441.

It is an arithmetic number, because the mean of its divisors is an integer number (36120153).

Almost surely, 2^144422321 is an apocalyptic number.

It is an amenable number.

144422321 is a deficient number, since it is larger than the sum of its proper divisors (58291).

144422321 is an equidigital number, since it uses as much as digits as its factorization.

144422321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58290.

The product of its digits is 1536, while the sum is 23.

The square root of 144422321 is about 12017.5838253785. The cubic root of 144422321 is about 524.6601834203.

Adding to 144422321 its reverse (123224441), we get a palindrome (267646762).

The spelling of 144422321 in words is "one hundred forty-four million, four hundred twenty-two thousand, three hundred twenty-one".