31606149191 has 2 divisors, whose sum is σ = 31606149192. Its totient is φ = 31606149190.

The previous prime is 31606149181. The next prime is 31606149193. The reversal of 31606149191 is 19194160613.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31606149191 - 2²⁶ = 31539040327 is a prime.

Together with 31606149193, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31606149193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15803074595 + 15803074596.

It is an arithmetic number, because the mean of its divisors is an integer number (15803074596).

Almost surely, 2^31606149191 is an apocalyptic number.

31606149191 is a deficient number, since it is larger than the sum of its proper divisors (1).

31606149191 is an equidigital number, since it uses as much as digits as its factorization.

31606149191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 41.

The spelling of 31606149191 in words is "thirty-one billion, six hundred six million, one hundred forty-nine thousand, one hundred ninety-one".