255322321 has 4 divisors (see below), whose sum is σ = 256080292. Its totient is φ = 254564352.

The previous prime is 255322307. The next prime is 255322343. The reversal of 255322321 is 123223552.

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 33640000 + 221682321 = 5800^2 + 14889^2 .

It is a cyclic number.

It is not a de Polignac number, because 255322321 - 2⁹ = 255321809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255322021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 378480 + ... + 379153.

It is an arithmetic number, because the mean of its divisors is an integer number (64020073).

Almost surely, 2^255322321 is an apocalyptic number.

It is an amenable number.

255322321 is a deficient number, since it is larger than the sum of its proper divisors (757971).

255322321 is an equidigital number, since it uses as much as digits as its factorization.

255322321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 757970.

The product of its digits is 3600, while the sum is 25.

The square root of 255322321 is about 15978.8084975069. The cubic root of 255322321 is about 634.3996400631.

Adding to 255322321 its reverse (123223552), we get a palindrome (378545873).

The spelling of 255322321 in words is "two hundred fifty-five million, three hundred twenty-two thousand, three hundred twenty-one".