321504320545231 has 2 divisors, whose sum is σ = 321504320545232. Its totient is φ = 321504320545230.

The previous prime is 321504320545171. The next prime is 321504320545241. The reversal of 321504320545231 is 132545023405123.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 321504320545231 - 2¹⁷ = 321504320414159 is a prime.

It is a super-2 number, since 2×321504320545231² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321504320545241) 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, 160752160272615 + 160752160272616.

It is an arithmetic number, because the mean of its divisors is an integer number (160752160272616).

Almost surely, 2^{321504320545231} is an apocalyptic number.

321504320545231 is a deficient number, since it is larger than the sum of its proper divisors (1).

321504320545231 is an equidigital number, since it uses as much as digits as its factorization.

321504320545231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432000, while the sum is 40.

The spelling of 321504320545231 in words is "three hundred twenty-one trillion, five hundred four billion, three hundred twenty million, five hundred forty-five thousand, two hundred thirty-one".