226209 has 4 divisors (see below), whose sum is σ = 301616. Its totient is φ = 150804.

The previous prime is 226201. The next prime is 226217. The reversal of 226209 is 902622.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (226201) and next prime (226217).

It is not a de Polignac number, because 226209 - 2³ = 226201 is a prime.

It is a D-number.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (226201) 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, 37699 + ... + 37704.

It is an arithmetic number, because the mean of its divisors is an integer number (75404).

2²²⁶²⁰⁹ is an apocalyptic number.

It is an amenable number.

226209 is a deficient number, since it is larger than the sum of its proper divisors (75407).

226209 is an equidigital number, since it uses as much as digits as its factorization.

226209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75406.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 226209 is about 475.6143395652. The cubic root of 226209 is about 60.9307644100.

It can be divided in two parts, 226 and 209, that added together give a triangular number (435 = T₂₉).

The spelling of 226209 in words is "two hundred twenty-six thousand, two hundred nine".