543321321 has 16 divisors (see below), whose sum is σ = 768387840. Its totient is φ = 340526160.

The previous prime is 543321301. The next prime is 543321349. The reversal of 543321321 is 123123345.

It is not a de Polignac number, because 543321321 - 2⁹ = 543320809 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 543321291 and 543321300.

It is not an unprimeable number, because it can be changed into a prime (543321301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28915 + ... + 43848.

It is an arithmetic number, because the mean of its divisors is an integer number (48024240).

Almost surely, 2^543321321 is an apocalyptic number.

It is an amenable number.

543321321 is a deficient number, since it is larger than the sum of its proper divisors (225066519).

543321321 is a wasteful number, since it uses less digits than its factorization.

543321321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72916.

The product of its digits is 2160, while the sum is 24.

The square root of 543321321 is about 23309.2539777660. The cubic root of 543321321 is about 815.9914019543.

Adding to 543321321 its reverse (123123345), we get a palindrome (666444666).

The spelling of 543321321 in words is "five hundred forty-three million, three hundred twenty-one thousand, three hundred twenty-one".