191526161 has 2 divisors, whose sum is σ = 191526162. Its totient is φ = 191526160.

The previous prime is 191526149. The next prime is 191526169. The reversal of 191526161 is 161625191.

191526161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 167857936 + 23668225 = 12956^2 + 4865^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-191526161 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (191526169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95763080 + 95763081.

It is an arithmetic number, because the mean of its divisors is an integer number (95763081).

Almost surely, 2^191526161 is an apocalyptic number.

It is an amenable number.

191526161 is a deficient number, since it is larger than the sum of its proper divisors (1).

191526161 is an equidigital number, since it uses as much as digits as its factorization.

191526161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3240, while the sum is 32.

The square root of 191526161 is about 13839.2977061699. The cubic root of 191526161 is about 576.4248579483.

The spelling of 191526161 in words is "one hundred ninety-one million, five hundred twenty-six thousand, one hundred sixty-one".