320120255 has 16 divisors (see below), whose sum is σ = 472793664. Its totient is φ = 202625280.

The previous prime is 320120237. The next prime is 320120287. The reversal of 320120255 is 552021023.

It is not a de Polignac number, because 320120255 - 2⁶ = 320120191 is a prime.

It is a super-2 number, since 2×320120255² = 204953955322530050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 351326 + ... + 352235.

It is an arithmetic number, because the mean of its divisors is an integer number (29549604).

Almost surely, 2^320120255 is an apocalyptic number.

320120255 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

320120255 is a deficient number, since it is larger than the sum of its proper divisors (152673409).

320120255 is a wasteful number, since it uses less digits than its factorization.

320120255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 703586.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 320120255 is about 17891.9047337057. The cubic root of 320120255 is about 684.0760484224.

Adding to 320120255 its reverse (552021023), we get a palindrome (872141278).

The spelling of 320120255 in words is "three hundred twenty million, one hundred twenty thousand, two hundred fifty-five".