31431112605163 has 2 divisors, whose sum is σ = 31431112605164. Its totient is φ = 31431112605162.

The previous prime is 31431112605131. The next prime is 31431112605173. The reversal of 31431112605163 is 36150621113413.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31431112605163 - 2⁵ = 31431112605131 is a prime.

It is not a weakly prime, because it can be changed into another prime (31431112605173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15715556302581 + 15715556302582.

It is an arithmetic number, because the mean of its divisors is an integer number (15715556302582).

Almost surely, 2^{31431112605163} is an apocalyptic number.

31431112605163 is a deficient number, since it is larger than the sum of its proper divisors (1).

31431112605163 is an equidigital number, since it uses as much as digits as its factorization.

31431112605163 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 37.

Adding to 31431112605163 its reverse (36150621113413), we get a palindrome (67581733718576).

The spelling of 31431112605163 in words is "thirty-one trillion, four hundred thirty-one billion, one hundred twelve million, six hundred five thousand, one hundred sixty-three".