543532321 has 8 divisors (see below), whose sum is σ = 548317224. Its totient is φ = 538767360.

The previous prime is 543532309. The next prime is 543532337. The reversal of 543532321 is 123235345.

It can be written as a sum of positive squares in 4 ways, for example, as 4363921 + 539168400 = 2089^2 + 23220^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 543532321 - 2⁵ = 543532289 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 543532321.

It is not an unprimeable number, because it can be changed into a prime (543532351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52641 + ... + 62113.

It is an arithmetic number, because the mean of its divisors is an integer number (68539653).

Almost surely, 2^543532321 is an apocalyptic number.

It is an amenable number.

543532321 is a deficient number, since it is larger than the sum of its proper divisors (4784903).

543532321 is a wasteful number, since it uses less digits than its factorization.

543532321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9971.

The product of its digits is 10800, while the sum is 28.

The square root of 543532321 is about 23313.7796378022. The cubic root of 543532321 is about 816.0970189535.

Adding to 543532321 its reverse (123235345), we get a palindrome (666767666).

The spelling of 543532321 in words is "five hundred forty-three million, five hundred thirty-two thousand, three hundred twenty-one".