191116151 has 2 divisors, whose sum is σ = 191116152. Its totient is φ = 191116150.

The previous prime is 191116141. The next prime is 191116157. The reversal of 191116151 is 151611191.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 191116151 - 2⁶ = 191116087 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 191116151.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (191116157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95558075 + 95558076.

It is an arithmetic number, because the mean of its divisors is an integer number (95558076).

Almost surely, 2^191116151 is an apocalyptic number.

191116151 is a deficient number, since it is larger than the sum of its proper divisors (1).

191116151 is an equidigital number, since it uses as much as digits as its factorization.

191116151 is an evil number, because the sum of its binary digits is even.

The product of its digits is 270, while the sum is 26.

The square root of 191116151 is about 13824.4765181181. The cubic root of 191116151 is about 576.0132365383.

The spelling of 191116151 in words is "one hundred ninety-one million, one hundred sixteen thousand, one hundred fifty-one".