225186191 has 2 divisors, whose sum is σ = 225186192. Its totient is φ = 225186190.

The previous prime is 225186173. The next prime is 225186193. The reversal of 225186191 is 191681522.

225186191 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 is a cyclic number.

It is not a de Polignac number, because 225186191 - 2⁶ = 225186127 is a prime.

Together with 225186193, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225186193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112593095 + 112593096.

It is an arithmetic number, because the mean of its divisors is an integer number (112593096).

Almost surely, 2^225186191 is an apocalyptic number.

225186191 is a deficient number, since it is larger than the sum of its proper divisors (1).

225186191 is an equidigital number, since it uses as much as digits as its factorization.

225186191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 35.

The square root of 225186191 is about 15006.2050832314. The cubic root of 225186191 is about 608.3879238598.

The spelling of 225186191 in words is "two hundred twenty-five million, one hundred eighty-six thousand, one hundred ninety-one".