543321243 has 16 divisors (see below), whose sum is σ = 805328160. Its totient is φ = 362030688.

The previous prime is 543321197. The next prime is 543321281. The reversal of 543321243 is 342123345.

It is not a de Polignac number, because 543321243 - 2¹⁴ = 543304859 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (543321643) 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, 68521 + ... + 76037.

It is an arithmetic number, because the mean of its divisors is an integer number (50333010).

Almost surely, 2^543321243 is an apocalyptic number.

543321243 is a deficient number, since it is larger than the sum of its proper divisors (262006917).

543321243 is a wasteful number, since it uses less digits than its factorization.

543321243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10203 (or 10197 counting only the distinct ones).

The product of its digits is 8640, while the sum is 27.

The square root of 543321243 is about 23309.2523046107. The cubic root of 543321243 is about 815.9913629060.

Adding to 543321243 its reverse (342123345), we get a palindrome (885444588).

The spelling of 543321243 in words is "five hundred forty-three million, three hundred twenty-one thousand, two hundred forty-three".