226691191 has 2 divisors, whose sum is σ = 226691192. Its totient is φ = 226691190.

The previous prime is 226691161. The next prime is 226691233. The reversal of 226691191 is 191196622.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 226691191 - 2⁵ = 226691159 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 226691191.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (226691111) 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, 113345595 + 113345596.

It is an arithmetic number, because the mean of its divisors is an integer number (113345596).

Almost surely, 2^226691191 is an apocalyptic number.

226691191 is a deficient number, since it is larger than the sum of its proper divisors (1).

226691191 is an equidigital number, since it uses as much as digits as its factorization.

226691191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11664, while the sum is 37.

The square root of 226691191 is about 15056.2674989521. The cubic root of 226691191 is about 609.7402737345.

The spelling of 226691191 in words is "two hundred twenty-six million, six hundred ninety-one thousand, one hundred ninety-one".