330442721 has 6 divisors (see below), whose sum is σ = 384392610. Its totient is φ = 283236576.

The previous prime is 330442709. The next prime is 330442729. The reversal of 330442721 is 127244033.

It can be written as a sum of positive squares in only one way, i.e., 327429025 + 3013696 = 18095^2 + 1736^2 .

It is not a de Polignac number, because 330442721 - 2¹⁴ = 330426337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (330442729) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3371816 + ... + 3371913.

It is an arithmetic number, because the mean of its divisors is an integer number (64065435).

Almost surely, 2^330442721 is an apocalyptic number.

It is an amenable number.

330442721 is a deficient number, since it is larger than the sum of its proper divisors (53949889).

330442721 is an equidigital number, since it uses as much as digits as its factorization.

330442721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6743743 (or 6743736 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 26.

The square root of 330442721 is about 18178.0835348504. The cubic root of 330442721 is about 691.3512141490.

Adding to 330442721 its reverse (127244033), we get a palindrome (457686754).

The spelling of 330442721 in words is "three hundred thirty million, four hundred forty-two thousand, seven hundred twenty-one".