255123321 has 4 divisors (see below), whose sum is σ = 340164432. Its totient is φ = 170082212.

The previous prime is 255123299. The next prime is 255123331. The reversal of 255123321 is 123321552.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 255123321 - 2¹⁰ = 255122297 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 255123291 and 255123300.

It is not an unprimeable number, because it can be changed into a prime (255123331) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 42520551 + ... + 42520556.

It is an arithmetic number, because the mean of its divisors is an integer number (85041108).

Almost surely, 2^255123321 is an apocalyptic number.

It is an amenable number.

255123321 is a deficient number, since it is larger than the sum of its proper divisors (85041111).

255123321 is an equidigital number, since it uses as much as digits as its factorization.

255123321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85041110.

The product of its digits is 1800, while the sum is 24.

The square root of 255123321 is about 15972.5802862280. The cubic root of 255123321 is about 634.2347787211.

Adding to 255123321 its reverse (123321552), we get a palindrome (378444873).

The spelling of 255123321 in words is "two hundred fifty-five million, one hundred twenty-three thousand, three hundred twenty-one".