323115225405521 has 2 divisors, whose sum is σ = 323115225405522. Its totient is φ = 323115225405520.

The previous prime is 323115225405509. The next prime is 323115225405529. The reversal of 323115225405521 is 125504522511323.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 179723222275921 + 143392003129600 = 13406089^2 + 11974640^2 .

It is an emirp because it is prime and its reverse (125504522511323) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 323115225405521 - 2¹⁴ = 323115225389137 is a prime.

It is not a weakly prime, because it can be changed into another prime (323115225405529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161557612702760 + 161557612702761.

It is an arithmetic number, because the mean of its divisors is an integer number (161557612702761).

Almost surely, 2^{323115225405521} is an apocalyptic number.

It is an amenable number.

323115225405521 is a deficient number, since it is larger than the sum of its proper divisors (1).

323115225405521 is an equidigital number, since it uses as much as digits as its factorization.

323115225405521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360000, while the sum is 41.

Adding to 323115225405521 its reverse (125504522511323), we get a palindrome (448619747916844).

The spelling of 323115225405521 in words is "three hundred twenty-three trillion, one hundred fifteen billion, two hundred twenty-five million, four hundred five thousand, five hundred twenty-one".