222509 has 12 divisors (see below), whose sum is σ = 273600. Its totient is φ = 179928.

The previous prime is 222499. The next prime is 222511. The reversal of 222509 is 905222.

It is not a de Polignac number, because 222509 - 2⁴ = 222493 is a prime.

It is a Curzon number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 812 + ... + 1050.

It is an arithmetic number, because the mean of its divisors is an integer number (22800).

2²²²⁵⁰⁹ is an apocalyptic number.

It is an amenable number.

222509 is a deficient number, since it is larger than the sum of its proper divisors (51091).

222509 is a wasteful number, since it uses less digits than its factorization.

222509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272 (or 265 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 222509 is about 471.7085964873. The cubic root of 222509 is about 60.5967307178.

The spelling of 222509 in words is "two hundred twenty-two thousand, five hundred nine".