321540425347 has 2 divisors, whose sum is σ = 321540425348. Its totient is φ = 321540425346.

The previous prime is 321540425321. The next prime is 321540425399. The reversal of 321540425347 is 743524045123.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-321540425347 is a prime.

It is not a weakly prime, because it can be changed into another prime (321540425147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160770212673 + 160770212674.

It is an arithmetic number, because the mean of its divisors is an integer number (160770212674).

Almost surely, 2^321540425347 is an apocalyptic number.

321540425347 is a deficient number, since it is larger than the sum of its proper divisors (1).

321540425347 is an equidigital number, since it uses as much as digits as its factorization.

321540425347 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 403200, while the sum is 40.

The spelling of 321540425347 in words is "three hundred twenty-one billion, five hundred forty million, four hundred twenty-five thousand, three hundred forty-seven".