328531111 has 4 divisors (see below), whose sum is σ = 339859800. Its totient is φ = 317202424.

The previous prime is 328531079. The next prime is 328531127. The reversal of 328531111 is 111135823.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 328531111 - 2⁵ = 328531079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328535111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5664301 + ... + 5664358.

It is an arithmetic number, because the mean of its divisors is an integer number (84964950).

Almost surely, 2^328531111 is an apocalyptic number.

328531111 is a deficient number, since it is larger than the sum of its proper divisors (11328689).

328531111 is a wasteful number, since it uses less digits than its factorization.

328531111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11328688.

The product of its digits is 720, while the sum is 25.

The square root of 328531111 is about 18125.4271949656. The cubic root of 328531111 is about 690.0154802940.

Adding to 328531111 its reverse (111135823), we get a palindrome (439666934).

The spelling of 328531111 in words is "three hundred twenty-eight million, five hundred thirty-one thousand, one hundred eleven".