231044440117 has 2 divisors, whose sum is σ = 231044440118. Its totient is φ = 231044440116.

The previous prime is 231044440069. The next prime is 231044440141. The reversal of 231044440117 is 711044440132.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 166361199876 + 64683240241 = 407874^2 + 254329^2 .

It is a cyclic number.

It is not a de Polignac number, because 231044440117 - 2¹¹ = 231044438069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231044440147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115522220058 + 115522220059.

It is an arithmetic number, because the mean of its divisors is an integer number (115522220059).

Almost surely, 2^231044440117 is an apocalyptic number.

It is an amenable number.

231044440117 is a deficient number, since it is larger than the sum of its proper divisors (1).

231044440117 is an equidigital number, since it uses as much as digits as its factorization.

231044440117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10752, while the sum is 31.

Adding to 231044440117 its reverse (711044440132), we get a palindrome (942088880249).

The spelling of 231044440117 in words is "two hundred thirty-one billion, forty-four million, four hundred forty thousand, one hundred seventeen".