328383521 has 2 divisors, whose sum is σ = 328383522. Its totient is φ = 328383520.

The previous prime is 328383491. The next prime is 328383529. The reversal of 328383521 is 125383823.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 255520225 + 72863296 = 15985^2 + 8536^2 .

It is a cyclic number.

It is not a de Polignac number, because 328383521 - 2¹⁰ = 328382497 is a prime.

It is not a weakly prime, because it can be changed into another prime (328383529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164191760 + 164191761.

It is an arithmetic number, because the mean of its divisors is an integer number (164191761).

Almost surely, 2^328383521 is an apocalyptic number.

It is an amenable number.

328383521 is a deficient number, since it is larger than the sum of its proper divisors (1).

328383521 is an equidigital number, since it uses as much as digits as its factorization.

328383521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 35.

The square root of 328383521 is about 18121.3553852906. The cubic root of 328383521 is about 689.9121368203.

The spelling of 328383521 in words is "three hundred twenty-eight million, three hundred eighty-three thousand, five hundred twenty-one".