331285 has 8 divisors (see below), whose sum is σ = 404640. Its totient is φ = 260304.

The previous prime is 331283. The next prime is 331301. The reversal of 331285 is 582133.

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 331285 - 2¹ = 331283 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 331285.

It is not an unprimeable number, because it can be changed into a prime (331283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 267 + ... + 856.

It is an arithmetic number, because the mean of its divisors is an integer number (50580).

2³³¹²⁸⁵ is an apocalyptic number.

It is an amenable number.

331285 is a deficient number, since it is larger than the sum of its proper divisors (73355).

331285 is a wasteful number, since it uses less digits than its factorization.

331285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1187.

The product of its digits is 720, while the sum is 22.

The square root of 331285 is about 575.5736269149. The cubic root of 331285 is about 69.1938120253.

It can be divided in two parts, 33128 and 5, that added together give a palindrome (33133).

The spelling of 331285 in words is "three hundred thirty-one thousand, two hundred eighty-five".