320221321255 has 8 divisors (see below), whose sum is σ = 419198820624. Its totient is φ = 232888233600.

The previous prime is 320221321241. The next prime is 320221321309. The reversal of 320221321255 is 552123122023.

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

It is not a de Polignac number, because 320221321255 - 2¹³ = 320221313063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2911102866 + ... + 2911102975.

It is an arithmetic number, because the mean of its divisors is an integer number (52399852578).

Almost surely, 2^320221321255 is an apocalyptic number.

320221321255 is a deficient number, since it is larger than the sum of its proper divisors (98977499369).

320221321255 is a wasteful number, since it uses less digits than its factorization.

320221321255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5822205857.

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 320221321255 its reverse (552123122023), we get a palindrome (872344443278).

The spelling of 320221321255 in words is "three hundred twenty billion, two hundred twenty-one million, three hundred twenty-one thousand, two hundred fifty-five".