23112191 has 2 divisors, whose sum is σ = 23112192. Its totient is φ = 23112190.

The previous prime is 23112179. The next prime is 23112209. The reversal of 23112191 is 19121132.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23112191 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23112121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11556095 + 11556096.

It is an arithmetic number, because the mean of its divisors is an integer number (11556096).

Almost surely, 2^23112191 is an apocalyptic number.

23112191 is a deficient number, since it is larger than the sum of its proper divisors (1).

23112191 is an equidigital number, since it uses as much as digits as its factorization.

23112191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108, while the sum is 20.

The square root of 23112191 is about 4807.5140145402. The cubic root of 23112191 is about 284.8483485793.

The spelling of 23112191 in words is "twenty-three million, one hundred twelve thousand, one hundred ninety-one".