311085 has 24 divisors (see below), whose sum is σ = 559104. Its totient is φ = 159840.

The previous prime is 311041. The next prime is 311099. The reversal of 311085 is 580113.

It is a happy number.

It is not a de Polignac number, because 311085 - 2⁶ = 311021 is a prime.

311085 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 23 ways as a sum of consecutive naturals, for example, 1284 + ... + 1506.

It is an arithmetic number, because the mean of its divisors is an integer number (23296).

2³¹¹⁰⁸⁵ is an apocalyptic number.

It is an amenable number.

311085 is a deficient number, since it is larger than the sum of its proper divisors (248019).

311085 is a wasteful number, since it uses less digits than its factorization.

311085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265 (or 262 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 311085 is about 557.7499439713. The cubic root of 311085 is about 67.7578614081.

Adding to 311085 its reverse (580113), we get a palindrome (891198).

It can be divided in two parts, 31108 and 5, that added together give a palindrome (31113).

The spelling of 311085 in words is "three hundred eleven thousand, eighty-five".