31120008191 has 2 divisors, whose sum is σ = 31120008192. Its totient is φ = 31120008190.

The previous prime is 31120008187. The next prime is 31120008233. The reversal of 31120008191 is 19180002113.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31120008191 - 2² = 31120008187 is a prime.

It is a super-4 number, since 4×31120008191⁴ (a number of 43 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31120008191.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31120008181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15560004095 + 15560004096.

It is an arithmetic number, because the mean of its divisors is an integer number (15560004096).

Almost surely, 2^31120008191 is an apocalyptic number.

31120008191 is a deficient number, since it is larger than the sum of its proper divisors (1).

31120008191 is an equidigital number, since it uses as much as digits as its factorization.

31120008191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 26.

The spelling of 31120008191 in words is "thirty-one billion, one hundred twenty million, eight thousand, one hundred ninety-one".