320663313271 has 16 divisors (see below), whose sum is σ = 371579174208. Its totient is φ = 271025913600.

The previous prime is 320663313137. The next prime is 320663313283. The reversal of 320663313271 is 172313366023.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320663313271 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 320663313271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320663313371) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2188161 + ... + 2330101.

It is an arithmetic number, because the mean of its divisors is an integer number (23223698388).

Almost surely, 2^320663313271 is an apocalyptic number.

320663313271 is a deficient number, since it is larger than the sum of its proper divisors (50915860937).

320663313271 is a wasteful number, since it uses less digits than its factorization.

320663313271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146442.

The product of its (nonzero) digits is 81648, while the sum is 37.

Adding to 320663313271 its reverse (172313366023), we get a palindrome (492976679294).

The spelling of 320663313271 in words is "three hundred twenty billion, six hundred sixty-three million, three hundred thirteen thousand, two hundred seventy-one".