320321316 has 24 divisors (see below), whose sum is σ = 854190400. Its totient is φ = 91520352.

The previous prime is 320321303. The next prime is 320321317. The reversal of 320321316 is 613123023.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 320321292 and 320321301.

It is not an unprimeable number, because it can be changed into a prime (320321317) 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, 1906591 + ... + 1906758.

Almost surely, 2^320321316 is an apocalyptic number.

It is an amenable number.

320321316 is an abundant number, since it is smaller than the sum of its proper divisors (533869084).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

320321316 is a wasteful number, since it uses less digits than its factorization.

320321316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3813363 (or 3813361 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 320321316 is about 17897.5226218603. The cubic root of 320321316 is about 684.2192365178.

Adding to 320321316 its reverse (613123023), we get a palindrome (933444339).

The spelling of 320321316 in words is "three hundred twenty million, three hundred twenty-one thousand, three hundred sixteen".