231303022217 has 2 divisors, whose sum is σ = 231303022218. Its totient is φ = 231303022216.

The previous prime is 231303022201. The next prime is 231303022229. The reversal of 231303022217 is 712220303132.

It is a happy number.

231303022217 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 228387454201 + 2915568016 = 477899^2 + 53996^2 .

It is a cyclic number.

It is not a de Polignac number, because 231303022217 - 2⁴ = 231303022201 is a prime.

It is not a weakly prime, because it can be changed into another prime (231303022267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115651511108 + 115651511109.

It is an arithmetic number, because the mean of its divisors is an integer number (115651511109).

Almost surely, 2^231303022217 is an apocalyptic number.

It is an amenable number.

231303022217 is a deficient number, since it is larger than the sum of its proper divisors (1).

231303022217 is an equidigital number, since it uses as much as digits as its factorization.

231303022217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 26.

Adding to 231303022217 its reverse (712220303132), we get a palindrome (943523325349).

The spelling of 231303022217 in words is "two hundred thirty-one billion, three hundred three million, twenty-two thousand, two hundred seventeen".