1323541553 has 2 divisors, whose sum is σ = 1323541554. Its totient is φ = 1323541552.

The previous prime is 1323541543. The next prime is 1323541619. The reversal of 1323541553 is 3551453231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1287876769 + 35664784 = 35887^2 + 5972^2 .

It is a cyclic number.

It is not a de Polignac number, because 1323541553 - 2⁴ = 1323541537 is a prime.

It is not a weakly prime, because it can be changed into another prime (1323541543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 661770776 + 661770777.

It is an arithmetic number, because the mean of its divisors is an integer number (661770777).

Almost surely, 2^1323541553 is an apocalyptic number.

It is an amenable number.

1323541553 is a deficient number, since it is larger than the sum of its proper divisors (1).

1323541553 is an equidigital number, since it uses as much as digits as its factorization.

1323541553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27000, while the sum is 32.

The square root of 1323541553 is about 36380.5106203857. The cubic root of 1323541553 is about 1097.9414815368.

Adding to 1323541553 its reverse (3551453231), we get a palindrome (4874994784).

The spelling of 1323541553 in words is "one billion, three hundred twenty-three million, five hundred forty-one thousand, five hundred fifty-three".