321551162465243 has 2 divisors, whose sum is σ = 321551162465244. Its totient is φ = 321551162465242.

The previous prime is 321551162465219. The next prime is 321551162465261. The reversal of 321551162465243 is 342564261155123.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 321551162465243 - 2¹² = 321551162461147 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 321551162465191 and 321551162465200.

It is not a weakly prime, because it can be changed into another prime (321551162465293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160775581232621 + 160775581232622.

It is an arithmetic number, because the mean of its divisors is an integer number (160775581232622).

Almost surely, 2^{321551162465243} is an apocalyptic number.

321551162465243 is a deficient number, since it is larger than the sum of its proper divisors (1).

321551162465243 is an equidigital number, since it uses as much as digits as its factorization.

321551162465243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184000, while the sum is 50.

The spelling of 321551162465243 in words is "three hundred twenty-one trillion, five hundred fifty-one billion, one hundred sixty-two million, four hundred sixty-five thousand, two hundred forty-three".