331165 has 8 divisors (see below), whose sum is σ = 401760. Its totient is φ = 262032.

The previous prime is 331159. The next prime is 331171. The reversal of 331165 is 561133.

It is an interprime number because it is at equal distance from previous prime (331159) and next prime (331171).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 331165 - 2⁹ = 330653 is a prime.

331165 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 226 + ... + 844.

It is an arithmetic number, because the mean of its divisors is an integer number (50220).

2³³¹¹⁶⁵ is an apocalyptic number.

It is an amenable number.

331165 is a deficient number, since it is larger than the sum of its proper divisors (70595).

331165 is a wasteful number, since it uses less digits than its factorization.

331165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 731.

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

The square root of 331165 is about 575.4693736421. The cubic root of 331165 is about 69.1854564199.

Adding to 331165 its reverse (561133), we get a palindrome (892298).

It can be divided in two parts, 331 and 165, that multiplied together give a triangular number (54615 = T₃₃₀).

The spelling of 331165 in words is "three hundred thirty-one thousand, one hundred sixty-five".