235221 has 16 divisors (see below), whose sum is σ = 374784. Its totient is φ = 128304.

The previous prime is 235211. The next prime is 235231. The reversal of 235221 is 122532.

It is an interprime number because it is at equal distance from previous prime (235211) and next prime (235231).

It is not a de Polignac number, because 235221 - 2¹⁰ = 234197 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 235221.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 235221.

It is not an unprimeable number, because it can be changed into a prime (235211) 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 15 ways as a sum of consecutive naturals, for example, 240 + ... + 726.

It is an arithmetic number, because the mean of its divisors is an integer number (23424).

2²³⁵²²¹ is an apocalyptic number.

235221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

235221 is a deficient number, since it is larger than the sum of its proper divisors (139563).

235221 is a wasteful number, since it uses less digits than its factorization.

235221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520.

The product of its digits is 120, while the sum is 15.

The square root of 235221 is about 484.9958762711. The cubic root of 235221 is about 61.7293964382.

Adding to 235221 its reverse (122532), we get a palindrome (357753).

The spelling of 235221 in words is "two hundred thirty-five thousand, two hundred twenty-one".