225189911 has 2 divisors, whose sum is σ = 225189912. Its totient is φ = 225189910.

The previous prime is 225189907. The next prime is 225189947. The reversal of 225189911 is 119981522.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 225189911 - 2² = 225189907 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225183911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112594955 + 112594956.

It is an arithmetic number, because the mean of its divisors is an integer number (112594956).

Almost surely, 2^225189911 is an apocalyptic number.

225189911 is a deficient number, since it is larger than the sum of its proper divisors (1).

225189911 is an equidigital number, since it uses as much as digits as its factorization.

225189911 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 38.

The square root of 225189911 is about 15006.3290314454. The cubic root of 225189911 is about 608.3912739625.

The spelling of 225189911 in words is "two hundred twenty-five million, one hundred eighty-nine thousand, nine hundred eleven".