320305055 has 8 divisors (see below), whose sum is σ = 439275552. Its totient is φ = 219637728.

The previous prime is 320305043. The next prime is 320305081. The reversal of 320305055 is 550503023.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320305055 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 320305055.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4575752 + ... + 4575821.

It is an arithmetic number, because the mean of its divisors is an integer number (54909444).

Almost surely, 2^320305055 is an apocalyptic number.

320305055 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

320305055 is a deficient number, since it is larger than the sum of its proper divisors (118970497).

320305055 is an equidigital number, since it uses as much as digits as its factorization.

320305055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9151585.

The product of its (nonzero) digits is 2250, while the sum is 23.

The square root of 320305055 is about 17897.0683353448. The cubic root of 320305055 is about 684.2076582715.

Adding to 320305055 its reverse (550503023), we get a palindrome (870808078).

The spelling of 320305055 in words is "three hundred twenty million, three hundred five thousand, fifty-five".