226665309 has 8 divisors (see below), whose sum is σ = 325468192. Its totient is φ = 139486320.

The previous prime is 226665287. The next prime is 226665317. The reversal of 226665309 is 903566622.

226665309 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 226665309 - 2⁷ = 226665181 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 5811931 = 226665309 / (2 + 2 + 6 + 6 + 6 + 5 + 3 + 0 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (226665319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2905927 + ... + 2906004.

It is an arithmetic number, because the mean of its divisors is an integer number (40683524).

Almost surely, 2^226665309 is an apocalyptic number.

It is an amenable number.

226665309 is a deficient number, since it is larger than the sum of its proper divisors (98802883).

226665309 is a wasteful number, since it uses less digits than its factorization.

226665309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5811947.

The product of its (nonzero) digits is 116640, while the sum is 39.

The square root of 226665309 is about 15055.4079652462. The cubic root of 226665309 is about 609.7170675712.

The spelling of 226665309 in words is "two hundred twenty-six million, six hundred sixty-five thousand, three hundred nine".