144631321 has 2 divisors, whose sum is σ = 144631322. Its totient is φ = 144631320.

The previous prime is 144631309. The next prime is 144631343. The reversal of 144631321 is 123136441.

144631321 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., 104448400 + 40182921 = 10220^2 + 6339^2 .

It is a cyclic number.

It is not a de Polignac number, because 144631321 - 2¹⁷ = 144500249 is a prime.

It is not a weakly prime, because it can be changed into another prime (144631621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72315660 + 72315661.

It is an arithmetic number, because the mean of its divisors is an integer number (72315661).

Almost surely, 2^144631321 is an apocalyptic number.

It is an amenable number.

144631321 is a deficient number, since it is larger than the sum of its proper divisors (1).

144631321 is an equidigital number, since it uses as much as digits as its factorization.

144631321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 25.

The square root of 144631321 is about 12026.2762732277. The cubic root of 144631321 is about 524.9131478397.

Adding to 144631321 its reverse (123136441), we get a palindrome (267767762).

The spelling of 144631321 in words is "one hundred forty-four million, six hundred thirty-one thousand, three hundred twenty-one".