320311131 has 8 divisors (see below), whose sum is σ = 488093184. Its totient is φ = 183034920.

The previous prime is 320311129. The next prime is 320311207. The reversal of 320311131 is 131113023.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 320311131 - 2¹ = 320311129 is a prime.

It is a super-2 number, since 2×320311131² = 205198441284998322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 320311131.

It is not an unprimeable number, because it can be changed into a prime (320311031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7626435 + ... + 7626476.

It is an arithmetic number, because the mean of its divisors is an integer number (61011648).

Almost surely, 2^320311131 is an apocalyptic number.

320311131 is a deficient number, since it is larger than the sum of its proper divisors (167782053).

320311131 is a wasteful number, since it uses less digits than its factorization.

320311131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15252921.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 320311131 is about 17897.2380830116. The cubic root of 320311131 is about 684.2119845841.

Adding to 320311131 its reverse (131113023), we get a palindrome (451424154).

The spelling of 320311131 in words is "three hundred twenty million, three hundred eleven thousand, one hundred thirty-one".