320213030311991 has 2 divisors, whose sum is σ = 320213030311992. Its totient is φ = 320213030311990.

The previous prime is 320213030311981. The next prime is 320213030312003. The reversal of 320213030311991 is 199113030312023.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 320213030311991 - 2¹⁰ = 320213030310967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320213030311921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160106515155995 + 160106515155996.

It is an arithmetic number, because the mean of its divisors is an integer number (160106515155996).

Almost surely, 2^{320213030311991} is an apocalyptic number.

320213030311991 is a deficient number, since it is larger than the sum of its proper divisors (1).

320213030311991 is an equidigital number, since it uses as much as digits as its factorization.

320213030311991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26244, while the sum is 38.

The spelling of 320213030311991 in words is "three hundred twenty trillion, two hundred thirteen billion, thirty million, three hundred eleven thousand, nine hundred ninety-one".