320031343 has 4 divisors (see below), whose sum is σ = 324415408. Its totient is φ = 315647280.

The previous prime is 320031337. The next prime is 320031359. The reversal of 320031343 is 343130023.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320031343 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 320031343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320031373) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2191923 + ... + 2192068.

It is an arithmetic number, because the mean of its divisors is an integer number (81103852).

Almost surely, 2^320031343 is an apocalyptic number.

320031343 is a deficient number, since it is larger than the sum of its proper divisors (4384065).

320031343 is an equidigital number, since it uses as much as digits as its factorization.

320031343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4384064.

The product of its (nonzero) digits is 648, while the sum is 19.

The square root of 320031343 is about 17889.4198620302. The cubic root of 320031343 is about 684.0127095150.

Adding to 320031343 its reverse (343130023), we get a palindrome (663161366).

It can be divided in two parts, 3200 and 31343, that added together give a palindrome (34543).

The spelling of 320031343 in words is "three hundred twenty million, thirty-one thousand, three hundred forty-three".