222506 has 4 divisors (see below), whose sum is σ = 333762. Its totient is φ = 111252.

The previous prime is 222499. The next prime is 222511. The reversal of 222506 is 605222.

222506 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.

It can be written as a sum of positive squares in only one way, i.e., 167281 + 55225 = 409^2 + 235^2 .

It is an unprimeable number.

222506 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55625 + ... + 55628.

2²²²⁵⁰⁶ is an apocalyptic number.

222506 is a deficient number, since it is larger than the sum of its proper divisors (111256).

222506 is a wasteful number, since it uses less digits than its factorization.

222506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111255.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 222506 is about 471.7054165472. The cubic root of 222506 is about 60.5964583828.

Adding to 222506 its reverse (605222), we get a palindrome (827728).

The spelling of 222506 in words is "two hundred twenty-two thousand, five hundred six".