311223032189 has 2 divisors, whose sum is σ = 311223032190. Its totient is φ = 311223032188.

The previous prime is 311223032069. The next prime is 311223032201. The reversal of 311223032189 is 981230322113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 249642128164 + 61580904025 = 499642^2 + 248155^2 .

It is an emirp because it is prime and its reverse (981230322113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 311223032189 - 2²⁴ = 311206254973 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311223032789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155611516094 + 155611516095.

It is an arithmetic number, because the mean of its divisors is an integer number (155611516095).

Almost surely, 2^311223032189 is an apocalyptic number.

It is an amenable number.

311223032189 is a deficient number, since it is larger than the sum of its proper divisors (1).

311223032189 is an equidigital number, since it uses as much as digits as its factorization.

311223032189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 35.

The spelling of 311223032189 in words is "three hundred eleven billion, two hundred twenty-three million, thirty-two thousand, one hundred eighty-nine".