320131543 has 4 divisors (see below), whose sum is σ = 320173920. Its totient is φ = 320089168.

The previous prime is 320131541. The next prime is 320131571. The reversal of 320131543 is 345131023.

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

It is a cyclic number.

It is not a de Polignac number, because 320131543 - 2¹ = 320131541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320131541) 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, 6430 + ... + 26107.

It is an arithmetic number, because the mean of its divisors is an integer number (80043480).

Almost surely, 2^320131543 is an apocalyptic number.

320131543 is a deficient number, since it is larger than the sum of its proper divisors (42377).

320131543 is an equidigital number, since it uses as much as digits as its factorization.

320131543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42376.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 320131543 is about 17892.2201808496. The cubic root of 320131543 is about 684.0840889005.

Adding to 320131543 its reverse (345131023), we get a palindrome (665262566).

The spelling of 320131543 in words is "three hundred twenty million, one hundred thirty-one thousand, five hundred forty-three".