165000331 has 4 divisors (see below), whose sum is σ = 168837592. Its totient is φ = 161163072.

The previous prime is 165000301. The next prime is 165000377. The reversal of 165000331 is 133000561.

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 165000331 - 2⁵ = 165000299 is a prime.

It is a super-2 number, since 2×165000331² = 54450218460219122, 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 = 165000299 and 165000308.

It is not an unprimeable number, because it can be changed into a prime (165000301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1918566 + ... + 1918651.

It is an arithmetic number, because the mean of its divisors is an integer number (42209398).

Almost surely, 2^165000331 is an apocalyptic number.

165000331 is a deficient number, since it is larger than the sum of its proper divisors (3837261).

165000331 is an equidigital number, since it uses as much as digits as its factorization.

165000331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3837260.

The product of its (nonzero) digits is 270, while the sum is 19.

The square root of 165000331 is about 12845.2454628162. The cubic root of 165000331 is about 548.4810220048.

Adding to 165000331 its reverse (133000561), we get a palindrome (298000892).

The spelling of 165000331 in words is "one hundred sixty-five million, three hundred thirty-one", and thus it is an aban number.