226478191 has 2 divisors, whose sum is σ = 226478192. Its totient is φ = 226478190.

The previous prime is 226478141. The next prime is 226478207. The reversal of 226478191 is 191874622.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-226478191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (226478141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 113239095 + 113239096.

It is an arithmetic number, because the mean of its divisors is an integer number (113239096).

Almost surely, 2^226478191 is an apocalyptic number.

226478191 is a deficient number, since it is larger than the sum of its proper divisors (1).

226478191 is an equidigital number, since it uses as much as digits as its factorization.

226478191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 40.

The square root of 226478191 is about 15049.1923703566. The cubic root of 226478191 is about 609.5492423791.

The spelling of 226478191 in words is "two hundred twenty-six million, four hundred seventy-eight thousand, one hundred ninety-one".