144433321 has 4 divisors (see below), whose sum is σ = 147158532. Its totient is φ = 141708112.

The previous prime is 144433279. The next prime is 144433381. The reversal of 144433321 is 123334441.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 80353296 + 64080025 = 8964^2 + 8005^2 .

It is a cyclic number.

It is not a de Polignac number, because 144433321 - 2⁹ = 144432809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144433381) 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 in 3 ways as a sum of consecutive naturals, for example, 1362526 + ... + 1362631.

It is an arithmetic number, because the mean of its divisors is an integer number (36789633).

Almost surely, 2^144433321 is an apocalyptic number.

It is an amenable number.

144433321 is a deficient number, since it is larger than the sum of its proper divisors (2725211).

144433321 is an equidigital number, since it uses as much as digits as its factorization.

144433321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2725210.

The product of its digits is 3456, while the sum is 25.

The square root of 144433321 is about 12018.0414793759. The cubic root of 144433321 is about 524.6735034192.

Adding to 144433321 its reverse (123334441), we get a palindrome (267767762).

The spelling of 144433321 in words is "one hundred forty-four million, four hundred thirty-three thousand, three hundred twenty-one".