225993191 has 2 divisors, whose sum is σ = 225993192. Its totient is φ = 225993190.

The previous prime is 225993139. The next prime is 225993197. The reversal of 225993191 is 191399522.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 225993191 - 2⁶ = 225993127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225993197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112996595 + 112996596.

It is an arithmetic number, because the mean of its divisors is an integer number (112996596).

Almost surely, 2^225993191 is an apocalyptic number.

225993191 is a deficient number, since it is larger than the sum of its proper divisors (1).

225993191 is an equidigital number, since it uses as much as digits as its factorization.

225993191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43740, while the sum is 41.

The square root of 225993191 is about 15033.0699126958. The cubic root of 225993191 is about 609.1138175774.

The spelling of 225993191 in words is "two hundred twenty-five million, nine hundred ninety-three thousand, one hundred ninety-one".