222561 has 8 divisors (see below), whose sum is σ = 329760. Its totient is φ = 148356.

The previous prime is 222557. The next prime is 222587. The reversal of 222561 is 165222.

222561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 222561 - 2² = 222557 is a prime.

It is not an unprimeable number, because it can be changed into a prime (222511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4095 + ... + 4148.

It is an arithmetic number, because the mean of its divisors is an integer number (41220).

2²²²⁵⁶¹ is an apocalyptic number.

It is an amenable number.

222561 is a deficient number, since it is larger than the sum of its proper divisors (107199).

222561 is an equidigital number, since it uses as much as digits as its factorization.

222561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8252 (or 8246 counting only the distinct ones).

The product of its digits is 240, while the sum is 18.

The square root of 222561 is about 471.7637120424. The cubic root of 222561 is about 60.6014508034.

Adding to 222561 its reverse (165222), we get a palindrome (387783).

The spelling of 222561 in words is "two hundred twenty-two thousand, five hundred sixty-one".