311485 has 4 divisors (see below), whose sum is σ = 373788. Its totient is φ = 249184.

The previous prime is 311473. The next prime is 311533. The reversal of 311485 is 584113.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 106276 + 205209 = 326^2 + 453^2 .

It is a cyclic number.

It is not a de Polignac number, because 311485 - 2⁵ = 311453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31144 + ... + 31153.

It is an arithmetic number, because the mean of its divisors is an integer number (93447).

2³¹¹⁴⁸⁵ is an apocalyptic number.

It is an amenable number.

311485 is a deficient number, since it is larger than the sum of its proper divisors (62303).

311485 is an equidigital number, since it uses as much as digits as its factorization.

311485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62302.

The product of its digits is 480, while the sum is 22.

The square root of 311485 is about 558.1084124075. The cubic root of 311485 is about 67.7868904904.

Adding to 311485 its reverse (584113), we get a palindrome (895598).

The spelling of 311485 in words is "three hundred eleven thousand, four hundred eighty-five".