225994989191 has 2 divisors, whose sum is σ = 225994989192. Its totient is φ = 225994989190.

The previous prime is 225994989173. The next prime is 225994989203. The reversal of 225994989191 is 191989499522.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 225994989191 - 2⁶ = 225994989127 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 (225994989131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112997494595 + 112997494596.

It is an arithmetic number, because the mean of its divisors is an integer number (112997494596).

Almost surely, 2^225994989191 is an apocalyptic number.

225994989191 is a deficient number, since it is larger than the sum of its proper divisors (1).

225994989191 is an equidigital number, since it uses as much as digits as its factorization.

225994989191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37791360, while the sum is 68.

The spelling of 225994989191 in words is "two hundred twenty-five billion, nine hundred ninety-four million, nine hundred eighty-nine thousand, one hundred ninety-one".