222409 has 4 divisors (see below), whose sum is σ = 242640. Its totient is φ = 202180.

The previous prime is 222403. The next prime is 222419. The reversal of 222409 is 904222.

It is a happy number.

222409 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 222409 - 2¹¹ = 220361 is a prime.

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 (222403) 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, 10099 + ... + 10120.

It is an arithmetic number, because the mean of its divisors is an integer number (60660).

2²²²⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

222409 is a deficient number, since it is larger than the sum of its proper divisors (20231).

222409 is a wasteful number, since it uses less digits than its factorization.

222409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20230.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 222409 is about 471.6025869310. The cubic root of 222409 is about 60.5876515629.

The spelling of 222409 in words is "two hundred twenty-two thousand, four hundred nine".