23115187 has 2 divisors, whose sum is σ = 23115188. Its totient is φ = 23115186.

The previous prime is 23115179. The next prime is 23115203. The reversal of 23115187 is 78151132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23115187 - 2³ = 23115179 is a prime.

It is not a weakly prime, because it can be changed into another prime (23115137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11557593 + 11557594.

It is an arithmetic number, because the mean of its divisors is an integer number (11557594).

Almost surely, 2^23115187 is an apocalyptic number.

23115187 is a deficient number, since it is larger than the sum of its proper divisors (1).

23115187 is an equidigital number, since it uses as much as digits as its factorization.

23115187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1680, while the sum is 28.

The square root of 23115187 is about 4807.8255999984. The cubic root of 23115187 is about 284.8606562078.

The spelling of 23115187 in words is "twenty-three million, one hundred fifteen thousand, one hundred eighty-seven".