330303221 has 2 divisors, whose sum is σ = 330303222. Its totient is φ = 330303220.

The previous prime is 330303209. The next prime is 330303223. The reversal of 330303221 is 122303033.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 270240721 + 60062500 = 16439^2 + 7750^2 .

It is a cyclic number.

It is not a de Polignac number, because 330303221 - 2⁶ = 330303157 is a prime.

Together with 330303223, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 330303221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (330303223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165151610 + 165151611.

It is an arithmetic number, because the mean of its divisors is an integer number (165151611).

Almost surely, 2^330303221 is an apocalyptic number.

It is an amenable number.

330303221 is a deficient number, since it is larger than the sum of its proper divisors (1).

330303221 is an equidigital number, since it uses as much as digits as its factorization.

330303221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 17.

The square root of 330303221 is about 18174.2460916540. The cubic root of 330303221 is about 691.2539133028.

Adding to 330303221 its reverse (122303033), we get a palindrome (452606254).

The spelling of 330303221 in words is "three hundred thirty million, three hundred three thousand, two hundred twenty-one".