231342242243117 has 2 divisors, whose sum is σ = 231342242243118. Its totient is φ = 231342242243116.

The previous prime is 231342242243113. The next prime is 231342242243159. The reversal of 231342242243117 is 711342242243132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 199954616961961 + 31387625281156 = 14140531^2 + 5602466^2 .

It is a cyclic number.

It is not a de Polignac number, because 231342242243117 - 2² = 231342242243113 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231342242243113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115671121121558 + 115671121121559.

It is an arithmetic number, because the mean of its divisors is an integer number (115671121121559).

Almost surely, 2^{231342242243117} is an apocalyptic number.

It is an amenable number.

231342242243117 is a deficient number, since it is larger than the sum of its proper divisors (1).

231342242243117 is an equidigital number, since it uses as much as digits as its factorization.

231342242243117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 387072, while the sum is 41.

Adding to 231342242243117 its reverse (711342242243132), we get a palindrome (942684484486249).

The spelling of 231342242243117 in words is "two hundred thirty-one trillion, three hundred forty-two billion, two hundred forty-two million, two hundred forty-three thousand, one hundred seventeen".