226639891 has 2 divisors, whose sum is σ = 226639892. Its totient is φ = 226639890.

The previous prime is 226639879. The next prime is 226639913. The reversal of 226639891 is 198936622.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 226639891 - 2²³ = 218251283 is a prime.

It is not a weakly prime, because it can be changed into another prime (226639811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 113319945 + 113319946.

It is an arithmetic number, because the mean of its divisors is an integer number (113319946).

Almost surely, 2^226639891 is an apocalyptic number.

226639891 is a deficient number, since it is larger than the sum of its proper divisors (1).

226639891 is an equidigital number, since it uses as much as digits as its factorization.

226639891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 279936, while the sum is 46.

The square root of 226639891 is about 15054.5637930828. The cubic root of 226639891 is about 609.6942757174.

The spelling of 226639891 in words is "two hundred twenty-six million, six hundred thirty-nine thousand, eight hundred ninety-one".