321534320053 has 2 divisors, whose sum is σ = 321534320054. Its totient is φ = 321534320052.

The previous prime is 321534320017. The next prime is 321534320057. The reversal of 321534320053 is 350023435123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 301838162404 + 19696157649 = 549398^2 + 140343^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-321534320053 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 321534319997 and 321534320024.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321534320057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160767160026 + 160767160027.

It is an arithmetic number, because the mean of its divisors is an integer number (160767160027).

Almost surely, 2^321534320053 is an apocalyptic number.

It is an amenable number.

321534320053 is a deficient number, since it is larger than the sum of its proper divisors (1).

321534320053 is an equidigital number, since it uses as much as digits as its factorization.

321534320053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 31.

Adding to 321534320053 its reverse (350023435123), we get a palindrome (671557755176).

The spelling of 321534320053 in words is "three hundred twenty-one billion, five hundred thirty-four million, three hundred twenty thousand, fifty-three".