222906 has 16 divisors (see below), whose sum is σ = 451584. Its totient is φ = 73344.

The previous prime is 222883. The next prime is 222913. The reversal of 222906 is 609222.

It is a happy number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 391 + ... + 773.

It is an arithmetic number, because the mean of its divisors is an integer number (28224).

2²²²⁹⁰⁶ is an apocalyptic number.

222906 is an abundant number, since it is smaller than the sum of its proper divisors (228678).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

222906 is a wasteful number, since it uses less digits than its factorization.

222906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485.

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

The square root of 222906 is about 472.1292195999. The cubic root of 222906 is about 60.6327481506.

It can be divided in two parts, 222 and 906, that added together give a triangular number (1128 = T₄₇).

The spelling of 222906 in words is "two hundred twenty-two thousand, nine hundred six".