144331321 has 2 divisors, whose sum is σ = 144331322. Its totient is φ = 144331320.

The previous prime is 144331301. The next prime is 144331331. The reversal of 144331321 is 123133441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 142468096 + 1863225 = 11936^2 + 1365^2 .

It is a cyclic number.

It is not a de Polignac number, because 144331321 - 2¹³ = 144323129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 144331292 and 144331301.

It is not a weakly prime, because it can be changed into another prime (144331301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72165660 + 72165661.

It is an arithmetic number, because the mean of its divisors is an integer number (72165661).

Almost surely, 2^144331321 is an apocalyptic number.

It is an amenable number.

144331321 is a deficient number, since it is larger than the sum of its proper divisors (1).

144331321 is an equidigital number, since it uses as much as digits as its factorization.

144331321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 22.

The square root of 144331321 is about 12013.7971099898. The cubic root of 144331321 is about 524.5499647512.

Adding to 144331321 its reverse (123133441), we get a palindrome (267464762).

The spelling of 144331321 in words is "one hundred forty-four million, three hundred thirty-one thousand, three hundred twenty-one".