255221333 has 4 divisors (see below), whose sum is σ = 255253440. Its totient is φ = 255189228.

The previous prime is 255221311. The next prime is 255221339. The reversal of 255221333 is 333122552.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 255221333 - 2¹⁰ = 255220309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255221339) 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, 5666 + ... + 23292.

It is an arithmetic number, because the mean of its divisors is an integer number (63813360).

Almost surely, 2^255221333 is an apocalyptic number.

It is an amenable number.

255221333 is a deficient number, since it is larger than the sum of its proper divisors (32107).

255221333 is a wasteful number, since it uses less digits than its factorization.

255221333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32106.

The product of its digits is 5400, while the sum is 26.

The square root of 255221333 is about 15975.6481245676. The cubic root of 255221333 is about 634.3159873697.

Adding to 255221333 its reverse (333122552), we get a palindrome (588343885).

The spelling of 255221333 in words is "two hundred fifty-five million, two hundred twenty-one thousand, three hundred thirty-three".