144321553 has 2 divisors, whose sum is σ = 144321554. Its totient is φ = 144321552.

The previous prime is 144321509. The next prime is 144321563. The reversal of 144321553 is 355123441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75481344 + 68840209 = 8688^2 + 8297^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144321553 is a prime.

It is not a weakly prime, because it can be changed into another prime (144321503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72160776 + 72160777.

It is an arithmetic number, because the mean of its divisors is an integer number (72160777).

Almost surely, 2^144321553 is an apocalyptic number.

It is an amenable number.

144321553 is a deficient number, since it is larger than the sum of its proper divisors (1).

144321553 is an equidigital number, since it uses as much as digits as its factorization.

144321553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7200, while the sum is 28.

The square root of 144321553 is about 12013.3905705259. The cubic root of 144321553 is about 524.5381310536.

Adding to 144321553 its reverse (355123441), we get a palindrome (499444994).

The spelling of 144321553 in words is "one hundred forty-four million, three hundred twenty-one thousand, five hundred fifty-three".