330402221 has 2 divisors, whose sum is σ = 330402222. Its totient is φ = 330402220.

The previous prime is 330402203. The next prime is 330402223. The reversal of 330402221 is 122204033.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 326199721 + 4202500 = 18061^2 + 2050^2 .

It is a cyclic number.

It is not a de Polignac number, because 330402221 - 2²⁶ = 263293357 is a prime.

Together with 330402223, 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 330402221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (330402223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165201110 + 165201111.

It is an arithmetic number, because the mean of its divisors is an integer number (165201111).

Almost surely, 2^330402221 is an apocalyptic number.

It is an amenable number.

330402221 is a deficient number, since it is larger than the sum of its proper divisors (1).

330402221 is an equidigital number, since it uses as much as digits as its factorization.

330402221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 330402221 is about 18176.9695218978. The cubic root of 330402221 is about 691.3229683378.

Adding to 330402221 its reverse (122204033), we get a palindrome (452606254).

The spelling of 330402221 in words is "three hundred thirty million, four hundred two thousand, two hundred twenty-one".