226288091 has 2 divisors, whose sum is σ = 226288092. Its totient is φ = 226288090.

The previous prime is 226288067. The next prime is 226288109. The reversal of 226288091 is 190882622.

Together with next prime (226288109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-226288091 is a prime.

It is not a weakly prime, because it can be changed into another prime (226288001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 113144045 + 113144046.

It is an arithmetic number, because the mean of its divisors is an integer number (113144046).

Almost surely, 2^226288091 is an apocalyptic number.

226288091 is a deficient number, since it is larger than the sum of its proper divisors (1).

226288091 is an equidigital number, since it uses as much as digits as its factorization.

226288091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 226288091 is about 15042.8750908861. The cubic root of 226288091 is about 609.3786479589.

The spelling of 226288091 in words is "two hundred twenty-six million, two hundred eighty-eight thousand, ninety-one".