220239 has 10 divisors (see below), whose sum is σ = 329120. Its totient is φ = 146772.

The previous prime is 220217. The next prime is 220243. The reversal of 220239 is 932022.

It is not a de Polignac number, because 220239 - 2⁸ = 219983 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220279) by changing a digit.

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 9 ways as a sum of consecutive naturals, for example, 1279 + ... + 1440.

It is an arithmetic number, because the mean of its divisors is an integer number (32912).

2²²⁰²³⁹ is an apocalyptic number.

220239 is a deficient number, since it is larger than the sum of its proper divisors (108881).

220239 is an equidigital number, since it uses as much as digits as its factorization.

220239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2731 (or 2722 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 220239 is about 469.2962816814. The cubic root of 220239 is about 60.3899600288.

The spelling of 220239 in words is "two hundred twenty thousand, two hundred thirty-nine".