230221 has 2 divisors, whose sum is σ = 230222. Its totient is φ = 230220.

The previous prime is 230213. The next prime is 230227. The reversal of 230221 is 122032.

230221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 148996 + 81225 = 386^2 + 285^2 .

It is a cyclic number.

It is not a de Polignac number, because 230221 - 2³ = 230213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 230198 and 230207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (230227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115110 + 115111.

It is an arithmetic number, because the mean of its divisors is an integer number (115111).

2²³⁰²²¹ is an apocalyptic number.

It is an amenable number.

230221 is a deficient number, since it is larger than the sum of its proper divisors (1).

230221 is an equidigital number, since it uses as much as digits as its factorization.

230221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 230221 is about 479.8135054373. The cubic root of 230221 is about 61.2888743917.

Adding to 230221 its reverse (122032), we get a palindrome (352253).

The spelling of 230221 in words is "two hundred thirty thousand, two hundred twenty-one".