321343075059491 has 2 divisors, whose sum is σ = 321343075059492. Its totient is φ = 321343075059490.

The previous prime is 321343075059473. The next prime is 321343075059499. The reversal of 321343075059491 is 194950570343123.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-321343075059491 is a prime.

It is a super-2 number, since 2×321343075059491² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (321343075059499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160671537529745 + 160671537529746.

It is an arithmetic number, because the mean of its divisors is an integer number (160671537529746).

Almost surely, 2^{321343075059491} is an apocalyptic number.

321343075059491 is a deficient number, since it is larger than the sum of its proper divisors (1).

321343075059491 is an equidigital number, since it uses as much as digits as its factorization.

321343075059491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12247200, while the sum is 56.

The spelling of 321343075059491 in words is "three hundred twenty-one trillion, three hundred forty-three billion, seventy-five million, fifty-nine thousand, four hundred ninety-one".