255523321 has 8 divisors (see below), whose sum is σ = 265593600. Its totient is φ = 245537040.

The previous prime is 255523313. The next prime is 255523393. The reversal of 255523321 is 123325552.

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

It is a cyclic number.

It is not a de Polignac number, because 255523321 - 2³ = 255523313 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 255523321.

It is not an unprimeable number, because it can be changed into a prime (255523621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14761 + ... + 26998.

It is an arithmetic number, because the mean of its divisors is an integer number (33199200).

Almost surely, 2^255523321 is an apocalyptic number.

It is an amenable number.

255523321 is a deficient number, since it is larger than the sum of its proper divisors (10070279).

255523321 is a wasteful number, since it uses less digits than its factorization.

255523321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41999.

The product of its digits is 9000, while the sum is 28.

The square root of 255523321 is about 15985.0968404949. The cubic root of 255523321 is about 634.5660713675.

Adding to 255523321 its reverse (123325552), we get a palindrome (378848873).

The spelling of 255523321 in words is "two hundred fifty-five million, five hundred twenty-three thousand, three hundred twenty-one".