31431012163 has 2 divisors, whose sum is σ = 31431012164. Its totient is φ = 31431012162.

The previous prime is 31431012149. The next prime is 31431012209. The reversal of 31431012163 is 36121013413.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31431012163 - 2⁵ = 31431012131 is a prime.

It is not a weakly prime, because it can be changed into another prime (31431012563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15715506081 + 15715506082.

It is an arithmetic number, because the mean of its divisors is an integer number (15715506082).

Almost surely, 2^31431012163 is an apocalyptic number.

31431012163 is a deficient number, since it is larger than the sum of its proper divisors (1).

31431012163 is an equidigital number, since it uses as much as digits as its factorization.

31431012163 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 31431012163 its reverse (36121013413), we get a palindrome (67552025576).

The spelling of 31431012163 in words is "thirty-one billion, four hundred thirty-one million, twelve thousand, one hundred sixty-three".