2117505191 has 2 divisors, whose sum is σ = 2117505192. Its totient is φ = 2117505190.

The previous prime is 2117505161. The next prime is 2117505199. The reversal of 2117505191 is 1915057112.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2117505191 - 2¹⁰ = 2117504167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2117505199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1058752595 + 1058752596.

It is an arithmetic number, because the mean of its divisors is an integer number (1058752596).

Almost surely, 2^2117505191 is an apocalyptic number.

2117505191 is a deficient number, since it is larger than the sum of its proper divisors (1).

2117505191 is an equidigital number, since it uses as much as digits as its factorization.

2117505191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3150, while the sum is 32.

The square root of 2117505191 is about 46016.3578632642. The cubic root of 2117505191 is about 1284.1275431496.

The spelling of 2117505191 in words is "two billion, one hundred seventeen million, five hundred five thousand, one hundred ninety-one".