231231017 has 2 divisors, whose sum is σ = 231231018. Its totient is φ = 231231016.

The previous prime is 231230963. The next prime is 231231031. The reversal of 231231017 is 710132132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 170328601 + 60902416 = 13051^2 + 7804^2 .

It is a cyclic number.

It is not a de Polignac number, because 231231017 - 2¹⁰ = 231229993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231231017.

It is not a weakly prime, because it can be changed into another prime (231231037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115615508 + 115615509.

It is an arithmetic number, because the mean of its divisors is an integer number (115615509).

Almost surely, 2^231231017 is an apocalyptic number.

It is an amenable number.

231231017 is a deficient number, since it is larger than the sum of its proper divisors (1).

231231017 is an equidigital number, since it uses as much as digits as its factorization.

231231017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 231231017 is about 15206.2821557408. The cubic root of 231231017 is about 613.7837172849.

Adding to 231231017 its reverse (710132132), we get a palindrome (941363149).

The spelling of 231231017 in words is "two hundred thirty-one million, two hundred thirty-one thousand, seventeen".