320216521331 has 8 divisors (see below), whose sum is σ = 365968533504. Its totient is φ = 274466207880.

The previous prime is 320216521271. The next prime is 320216521343. The reversal of 320216521331 is 133125612023.

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 320216521331 - 2²² = 320212327027 is a prime.

It is a super-2 number, since 2×320216521331² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 320216521294 and 320216521303.

It is not an unprimeable number, because it can be changed into a prime (320216521351) by changing a digit.

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, 8756 + ... + 800318.

It is an arithmetic number, because the mean of its divisors is an integer number (45746066688).

Almost surely, 2^320216521331 is an apocalyptic number.

320216521331 is a deficient number, since it is larger than the sum of its proper divisors (45752012173).

320216521331 is an equidigital number, since it uses as much as digits as its factorization.

320216521331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 849361.

The product of its (nonzero) digits is 6480, while the sum is 29.

The spelling of 320216521331 in words is "three hundred twenty billion, two hundred sixteen million, five hundred twenty-one thousand, three hundred thirty-one".