234320221 has 2 divisors, whose sum is σ = 234320222. Its totient is φ = 234320220.

The previous prime is 234320209. The next prime is 234320237. The reversal of 234320221 is 122023432.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 230614596 + 3705625 = 15186^2 + 1925^2 .

It is a cyclic number.

It is not a de Polignac number, because 234320221 - 2⁵ = 234320189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (234320621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 117160110 + 117160111.

It is an arithmetic number, because the mean of its divisors is an integer number (117160111).

Almost surely, 2^234320221 is an apocalyptic number.

It is an amenable number.

234320221 is a deficient number, since it is larger than the sum of its proper divisors (1).

234320221 is an equidigital number, since it uses as much as digits as its factorization.

234320221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 234320221 is about 15307.5217131971. The cubic root of 234320221 is about 616.5049804821.

Adding to 234320221 its reverse (122023432), we get a palindrome (356343653).

The spelling of 234320221 in words is "two hundred thirty-four million, three hundred twenty thousand, two hundred twenty-one".