320855 has 4 divisors (see below), whose sum is σ = 385032. Its totient is φ = 256680.

The previous prime is 320851. The next prime is 320861. The reversal of 320855 is 558023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 558023 = 181 ⋅3083.

It is not a de Polignac number, because 320855 - 2² = 320851 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 320855.

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 320855.

It is not an unprimeable number, because it can be changed into a prime (320851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32081 + ... + 32090.

It is an arithmetic number, because the mean of its divisors is an integer number (96258).

2³²⁰⁸⁵⁵ is an apocalyptic number.

320855 is a deficient number, since it is larger than the sum of its proper divisors (64177).

320855 is an equidigital number, since it uses as much as digits as its factorization.

320855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64176.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 320855 is about 566.4406411973. The cubic root of 320855 is about 68.4599015856.

Adding to 320855 its reverse (558023), we get a palindrome (878878).

The spelling of 320855 in words is "three hundred twenty thousand, eight hundred fifty-five".