31373020163 has 2 divisors, whose sum is σ = 31373020164. Its totient is φ = 31373020162.

The previous prime is 31373020111. The next prime is 31373020171. The reversal of 31373020163 is 36102037313.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31373020163 - 2⁸ = 31373019907 is a prime.

It is not a weakly prime, because it can be changed into another prime (31373020103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15686510081 + 15686510082.

It is an arithmetic number, because the mean of its divisors is an integer number (15686510082).

Almost surely, 2^31373020163 is an apocalyptic number.

31373020163 is a deficient number, since it is larger than the sum of its proper divisors (1).

31373020163 is an equidigital number, since it uses as much as digits as its factorization.

31373020163 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6804, while the sum is 29.

Adding to 31373020163 its reverse (36102037313), we get a palindrome (67475057476).

The spelling of 31373020163 in words is "thirty-one billion, three hundred seventy-three million, twenty thousand, one hundred sixty-three".