311232387454897 has 2 divisors, whose sum is σ = 311232387454898. Its totient is φ = 311232387454896.

The previous prime is 311232387454867. The next prime is 311232387454991. The reversal of 311232387454897 is 798454783232113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 156409140500496 + 154823246954401 = 12506364^2 + 12442799^2 .

It is a cyclic number.

It is not a de Polignac number, because 311232387454897 - 2¹¹ = 311232387452849 is a prime.

It is not a weakly prime, because it can be changed into another prime (311232387454867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155616193727448 + 155616193727449.

It is an arithmetic number, because the mean of its divisors is an integer number (155616193727449).

Almost surely, 2^{311232387454897} is an apocalyptic number.

It is an amenable number.

311232387454897 is a deficient number, since it is larger than the sum of its proper divisors (1).

311232387454897 is an equidigital number, since it uses as much as digits as its factorization.

311232387454897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 243855360, while the sum is 67.

The spelling of 311232387454897 in words is "three hundred eleven trillion, two hundred thirty-two billion, three hundred eighty-seven million, four hundred fifty-four thousand, eight hundred ninety-seven".