328631231 has 4 divisors (see below), whose sum is σ = 332791200. Its totient is φ = 324471264.

The previous prime is 328631227. The next prime is 328631243. The reversal of 328631231 is 132136823.

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 328631231 - 2² = 328631227 is a prime.

It is a super-2 number, since 2×328631231² = 215996971977150722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 328631194 and 328631203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328631221) 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, 2079866 + ... + 2080023.

It is an arithmetic number, because the mean of its divisors is an integer number (83197800).

Almost surely, 2^328631231 is an apocalyptic number.

328631231 is a deficient number, since it is larger than the sum of its proper divisors (4159969).

328631231 is an equidigital number, since it uses as much as digits as its factorization.

328631231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4159968.

The product of its digits is 5184, while the sum is 29.

The square root of 328631231 is about 18128.1888505168. The cubic root of 328631231 is about 690.0855673481.

The spelling of 328631231 in words is "three hundred twenty-eight million, six hundred thirty-one thousand, two hundred thirty-one".