31681671367 has 2 divisors, whose sum is σ = 31681671368. Its totient is φ = 31681671366.

The previous prime is 31681671361. The next prime is 31681671397. The reversal of 31681671367 is 76317618613.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31681671367 - 2³¹ = 29534187719 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31681671367.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31681671361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15840835683 + 15840835684.

It is an arithmetic number, because the mean of its divisors is an integer number (15840835684).

Almost surely, 2^31681671367 is an apocalyptic number.

31681671367 is a deficient number, since it is larger than the sum of its proper divisors (1).

31681671367 is an equidigital number, since it uses as much as digits as its factorization.

31681671367 is an evil number, because the sum of its binary digits is even.

The product of its digits is 762048, while the sum is 49.

The spelling of 31681671367 in words is "thirty-one billion, six hundred eighty-one million, six hundred seventy-one thousand, three hundred sixty-seven".