226509 has 4 divisors (see below), whose sum is σ = 302016. Its totient is φ = 151004.

The previous prime is 226487. The next prime is 226511. The reversal of 226509 is 905622.

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 a cyclic number.

It is not a de Polignac number, because 226509 - 2⁷ = 226381 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (226549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37749 + ... + 37754.

It is an arithmetic number, because the mean of its divisors is an integer number (75504).

2²²⁶⁵⁰⁹ is an apocalyptic number.

It is an amenable number.

226509 is a deficient number, since it is larger than the sum of its proper divisors (75507).

226509 is an equidigital number, since it uses as much as digits as its factorization.

226509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75506.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 226509 is about 475.9296166452. The cubic root of 226509 is about 60.9576881171.

The spelling of 226509 in words is "two hundred twenty-six thousand, five hundred nine".