222609 has 4 divisors (see below), whose sum is σ = 296816. Its totient is φ = 148404.

The previous prime is 222601. The next prime is 222613. The reversal of 222609 is 906222.

It is a happy number.

222609 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 a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 222609 - 2³ = 222601 is a prime.

It is a D-number.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 222609.

It is not an unprimeable number, because it can be changed into a prime (222601) 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, 37099 + ... + 37104.

It is an arithmetic number, because the mean of its divisors is an integer number (74204).

2²²²⁶⁰⁹ is an apocalyptic number.

It is an amenable number.

222609 is a deficient number, since it is larger than the sum of its proper divisors (74207).

222609 is an equidigital number, since it uses as much as digits as its factorization.

222609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74206.

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

The square root of 222609 is about 471.8145822248. The cubic root of 222609 is about 60.6058071530.

The spelling of 222609 in words is "two hundred twenty-two thousand, six hundred nine".