330561 has 40 divisors (see below), whose sum is σ = 627264. Its totient is φ = 168480.

The previous prime is 330557. The next prime is 330563. The reversal of 330561 is 165033.

It is not a de Polignac number, because 330561 - 2² = 330557 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 330561.

It is not an unprimeable number, because it can be changed into a prime (330563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 6211 + ... + 6263.

2³³⁰⁵⁶¹ is an apocalyptic number.

It is an amenable number.

330561 is a deficient number, since it is larger than the sum of its proper divisors (296703).

330561 is a wasteful number, since it uses less digits than its factorization.

330561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83 (or 74 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 18.

The square root of 330561 is about 574.9443451326. The cubic root of 330561 is about 69.1433691959.

Adding to 330561 its reverse (165033), we get a palindrome (495594).

The spelling of 330561 in words is "three hundred thirty thousand, five hundred sixty-one".