31440238577117 has 2 divisors, whose sum is σ = 31440238577118. Its totient is φ = 31440238577116.

The previous prime is 31440238577107. The next prime is 31440238577119. The reversal of 31440238577117 is 71177583204413.

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., 31336047775321 + 104190801796 = 5597861^2 + 322786^2 .

It is a cyclic number.

It is not a de Polignac number, because 31440238577117 - 2¹⁰ = 31440238576093 is a prime.

Together with 31440238577119, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31440238577119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15720119288558 + 15720119288559.

It is an arithmetic number, because the mean of its divisors is an integer number (15720119288559).

Almost surely, 2^{31440238577117} is an apocalyptic number.

It is an amenable number.

31440238577117 is a deficient number, since it is larger than the sum of its proper divisors (1).

31440238577117 is an equidigital number, since it uses as much as digits as its factorization.

31440238577117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3951360, while the sum is 53.

The spelling of 31440238577117 in words is "thirty-one trillion, four hundred forty billion, two hundred thirty-eight million, five hundred seventy-seven thousand, one hundred seventeen".