231310117 has 2 divisors, whose sum is σ = 231310118. Its totient is φ = 231310116.

The previous prime is 231310091. The next prime is 231310159. The reversal of 231310117 is 711013132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 193376836 + 37933281 = 13906^2 + 6159^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231310117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231310094 and 231310103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231310187) 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, 115655058 + 115655059.

It is an arithmetic number, because the mean of its divisors is an integer number (115655059).

Almost surely, 2^231310117 is an apocalyptic number.

It is an amenable number.

231310117 is a deficient number, since it is larger than the sum of its proper divisors (1).

231310117 is an equidigital number, since it uses as much as digits as its factorization.

231310117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 126, while the sum is 19.

The square root of 231310117 is about 15208.8828320820. The cubic root of 231310117 is about 613.8536974541.

Adding to 231310117 its reverse (711013132), we get a palindrome (942323249).

The spelling of 231310117 in words is "two hundred thirty-one million, three hundred ten thousand, one hundred seventeen".