320131116 has 144 divisors (see below), whose sum is σ = 892513440. Its totient is φ = 100154880.

The previous prime is 320131103. The next prime is 320131121. The reversal of 320131116 is 611131023.

It is a super-3 number, since 3×320131116³ (a number of 26 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1155570 + ... + 1155846.

It is an arithmetic number, because the mean of its divisors is an integer number (6198010).

Almost surely, 2^320131116 is an apocalyptic number.

320131116 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 320131116, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (446256720).

320131116 is an abundant number, since it is smaller than the sum of its proper divisors (572382324).

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

320131116 is a wasteful number, since it uses less digits than its factorization.

320131116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366 (or 352 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 320131116 is about 17892.2082482851. The cubic root of 320131116 is about 684.0837847504.

Adding to 320131116 its reverse (611131023), we get a palindrome (931262139).

The spelling of 320131116 in words is "three hundred twenty million, one hundred thirty-one thousand, one hundred sixteen".