328121031 has 16 divisors (see below), whose sum is σ = 501709824. Its totient is φ = 186854304.

The previous prime is 328121011. The next prime is 328121041. The reversal of 328121031 is 130121823.

It is not a de Polignac number, because 328121031 - 2¹⁵ = 328088263 is a prime.

It is a super-2 number, since 2×328121031² = 215326821969005922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 328120989 and 328121007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328121011) 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 15 ways as a sum of consecutive naturals, for example, 20511 + ... + 32816.

It is an arithmetic number, because the mean of its divisors is an integer number (31356864).

Almost surely, 2^328121031 is an apocalyptic number.

328121031 is a deficient number, since it is larger than the sum of its proper divisors (173588793).

328121031 is a wasteful number, since it uses less digits than its factorization.

328121031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53630.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 328121031 is about 18114.1113775973. Note that the first 3 decimals coincide. The cubic root of 328121031 is about 689.7282630885.

Adding to 328121031 its reverse (130121823), we get a palindrome (458242854).

The spelling of 328121031 in words is "three hundred twenty-eight million, one hundred twenty-one thousand, thirty-one".