320120331 has 16 divisors (see below), whose sum is σ = 431537184. Its totient is φ = 211071744.

The previous prime is 320120329. The next prime is 320120347. The reversal of 320120331 is 133021023.

It is not a de Polignac number, because 320120331 - 2¹ = 320120329 is a prime.

It is a super-2 number, since 2×320120331² = 204954052639099122, 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 320120331.

It is not an unprimeable number, because it can be changed into a prime (320120351) 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, 108285 + ... + 111201.

It is an arithmetic number, because the mean of its divisors is an integer number (26971074).

Almost surely, 2^320120331 is an apocalyptic number.

320120331 is a deficient number, since it is larger than the sum of its proper divisors (111416853).

320120331 is a wasteful number, since it uses less digits than its factorization.

320120331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3310.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 320120331 is about 17891.9068575711. The cubic root of 320120331 is about 684.0761025581.

Adding to 320120331 its reverse (133021023), we get a palindrome (453141354).

It can be divided in two parts, 3201 and 20331, that added together give a palindrome (23532).

The spelling of 320120331 in words is "three hundred twenty million, one hundred twenty thousand, three hundred thirty-one".