239221 has 8 divisors (see below), whose sum is σ = 253080. Its totient is φ = 225792.

The previous prime is 239201. The next prime is 239231. The reversal of 239221 is 122932.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3025 + 236196 = 55^2 + 486^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 239221 - 2⁹ = 238709 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 (239201) 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 7 ways as a sum of consecutive naturals, for example, 2061 + ... + 2173.

It is an arithmetic number, because the mean of its divisors is an integer number (31635).

2²³⁹²²¹ is an apocalyptic number.

It is an amenable number.

239221 is a deficient number, since it is larger than the sum of its proper divisors (13859).

239221 is a wasteful number, since it uses less digits than its factorization.

239221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215.

The product of its digits is 216, while the sum is 19.

The square root of 239221 is about 489.1022388008. The cubic root of 239221 is about 62.0773401819.

The spelling of 239221 in words is "two hundred thirty-nine thousand, two hundred twenty-one".