320343543 has 12 divisors (see below), whose sum is σ = 498312360. Its totient is φ = 197134416.

The previous prime is 320343533. The next prime is 320343547. The reversal of 320343543 is 345343023.

It is a happy number.

It is not a de Polignac number, because 320343543 - 2¹² = 320339447 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320343547) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1368873 + ... + 1369106.

It is an arithmetic number, because the mean of its divisors is an integer number (41526030).

Almost surely, 2^320343543 is an apocalyptic number.

320343543 is a deficient number, since it is larger than the sum of its proper divisors (177968817).

320343543 is a wasteful number, since it uses less digits than its factorization.

320343543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2737998 (or 2737995 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 27.

The square root of 320343543 is about 17898.1435629509. The cubic root of 320343543 is about 684.2350620743.

Adding to 320343543 its reverse (345343023), we get a palindrome (665686566).

The spelling of 320343543 in words is "three hundred twenty million, three hundred forty-three thousand, five hundred forty-three".