226718309 has 4 divisors (see below), whose sum is σ = 226769004. Its totient is φ = 226667616.

The previous prime is 226718299. The next prime is 226718339. The reversal of 226718309 is 903817622.

226718309 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 903817622 = 2 ⋅451908811.

It can be written as a sum of positive squares in 2 ways, for example, as 124768900 + 101949409 = 11170^2 + 10097^2 .

It is a cyclic number.

It is not a de Polignac number, because 226718309 - 2⁸ = 226718053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (226718339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17912 + ... + 27825.

It is an arithmetic number, because the mean of its divisors is an integer number (56692251).

Almost surely, 2^226718309 is an apocalyptic number.

It is an amenable number.

226718309 is a deficient number, since it is larger than the sum of its proper divisors (50695).

226718309 is an equidigital number, since it uses as much as digits as its factorization.

226718309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50694.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 226718309 is about 15057.1680272221. The cubic root of 226718309 is about 609.7645862179.

The spelling of 226718309 in words is "two hundred twenty-six million, seven hundred eighteen thousand, three hundred nine".