31671881881127 has 2 divisors, whose sum is σ = 31671881881128. Its totient is φ = 31671881881126.

The previous prime is 31671881881051. The next prime is 31671881881153. The reversal of 31671881881127 is 72118818817613.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31671881881127 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31671881881127.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31671881881427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15835940940563 + 15835940940564.

It is an arithmetic number, because the mean of its divisors is an integer number (15835940940564).

Almost surely, 2^{31671881881127} is an apocalyptic number.

31671881881127 is a deficient number, since it is larger than the sum of its proper divisors (1).

31671881881127 is an equidigital number, since it uses as much as digits as its factorization.

31671881881127 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7225344, while the sum is 62.

The spelling of 31671881881127 in words is "thirty-one trillion, six hundred seventy-one billion, eight hundred eighty-one million, eight hundred eighty-one thousand, one hundred twenty-seven".