222406 has 8 divisors (see below), whose sum is σ = 339264. Its totient is φ = 109320.

The previous prime is 222403. The next prime is 222419. The reversal of 222406 is 604222.

222406 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 a self number, because there is not a number n which added to its sum of digits gives 222406.

It is a congruent number.

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, 790 + ... + 1033.

It is an arithmetic number, because the mean of its divisors is an integer number (42408).

2²²²⁴⁰⁶ is an apocalyptic number.

222406 is a deficient number, since it is larger than the sum of its proper divisors (116858).

222406 is a wasteful number, since it uses less digits than its factorization.

222406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1886.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 222406 is about 471.5994062761. The cubic root of 222406 is about 60.5873791462.

Adding to 222406 its reverse (604222), we get a palindrome (826628).

The spelling of 222406 in words is "two hundred twenty-two thousand, four hundred six".