144431317 has 2 divisors, whose sum is σ = 144431318. Its totient is φ = 144431316.

The previous prime is 144431279. The next prime is 144431321. The reversal of 144431317 is 713134441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131079601 + 13351716 = 11449^2 + 3654^2 .

It is an emirp because it is prime and its reverse (713134441) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144431317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144431377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72215658 + 72215659.

It is an arithmetic number, because the mean of its divisors is an integer number (72215659).

Almost surely, 2^144431317 is an apocalyptic number.

It is an amenable number.

144431317 is a deficient number, since it is larger than the sum of its proper divisors (1).

144431317 is an equidigital number, since it uses as much as digits as its factorization.

144431317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 28.

The square root of 144431317 is about 12017.9581044369. The cubic root of 144431317 is about 524.6710768080.

Adding to 144431317 its reverse (713134441), we get a palindrome (857565758).

It can be divided in two parts, 1444 and 31317, that added together give a square (32761 = 181²).

The spelling of 144431317 in words is "one hundred forty-four million, four hundred thirty-one thousand, three hundred seventeen".