328185231 has 16 divisors (see below), whose sum is σ = 478259328. Its totient is φ = 198525600.

The previous prime is 328185203. The next prime is 328185269. The reversal of 328185231 is 132581823.

It is not a de Polignac number, because 328185231 - 2⁷ = 328185103 is a prime.

It is a super-2 number, since 2×328185231² = 215411091693046722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 328185192 and 328185201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328185131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8961 + ... + 27141.

It is an arithmetic number, because the mean of its divisors is an integer number (29891208).

Almost surely, 2^328185231 is an apocalyptic number.

328185231 is a deficient number, since it is larger than the sum of its proper divisors (150074097).

328185231 is a wasteful number, since it uses less digits than its factorization.

328185231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18742.

The product of its digits is 11520, while the sum is 33.

The square root of 328185231 is about 18115.8833899979. The cubic root of 328185231 is about 689.7732441195.

The spelling of 328185231 in words is "three hundred twenty-eight million, one hundred eighty-five thousand, two hundred thirty-one".