320455543 has 4 divisors (see below), whose sum is σ = 326501928. Its totient is φ = 314409160.

The previous prime is 320455537. The next prime is 320455561. The reversal of 320455543 is 345554023.

It is a happy number.

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-320455543 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320453543) 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, 3023113 + ... + 3023218.

It is an arithmetic number, because the mean of its divisors is an integer number (81625482).

Almost surely, 2^320455543 is an apocalyptic number.

320455543 is a deficient number, since it is larger than the sum of its proper divisors (6046385).

320455543 is an equidigital number, since it uses as much as digits as its factorization.

320455543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6046384.

The product of its (nonzero) digits is 36000, while the sum is 31.

The square root of 320455543 is about 17901.2721056354. The cubic root of 320455543 is about 684.3147945982.

The spelling of 320455543 in words is "three hundred twenty million, four hundred fifty-five thousand, five hundred forty-three".