320013243521 has 8 divisors (see below), whose sum is σ = 320810360640. Its totient is φ = 319216701168.

The previous prime is 320013243481. The next prime is 320013243541. The reversal of 320013243521 is 125342310023.

It is a happy number.

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 320013243521 - 2¹⁸ = 320012981377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320013243541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 982190 + ... + 1266776.

It is an arithmetic number, because the mean of its divisors is an integer number (40101295080).

Almost surely, 2^320013243521 is an apocalyptic number.

It is an amenable number.

320013243521 is a deficient number, since it is larger than the sum of its proper divisors (797117119).

320013243521 is a wasteful number, since it uses less digits than its factorization.

320013243521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287383.

The product of its (nonzero) digits is 4320, while the sum is 26.

Adding to 320013243521 its reverse (125342310023), we get a palindrome (445355553544).

The spelling of 320013243521 in words is "three hundred twenty billion, thirteen million, two hundred forty-three thousand, five hundred twenty-one".