543506401 has 4 divisors (see below), whose sum is σ = 552416404. Its totient is φ = 534596400.

The previous prime is 543506347. The next prime is 543506417. The reversal of 543506401 is 104605345.

543506401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 57744801 + 485761600 = 7599^2 + 22040^2 .

It is a cyclic number.

It is not a de Polignac number, because 543506401 - 2⁹ = 543505889 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 543506401.

It is not an unprimeable number, because it can be changed into a prime (543506501) 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, 4454910 + ... + 4455031.

It is an arithmetic number, because the mean of its divisors is an integer number (138104101).

Almost surely, 2^543506401 is an apocalyptic number.

It is an amenable number.

543506401 is a deficient number, since it is larger than the sum of its proper divisors (8910003).

543506401 is an equidigital number, since it uses as much as digits as its factorization.

543506401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8910002.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 543506401 is about 23313.2237367551. The cubic root of 543506401 is about 816.0840460537.

It can be divided in two parts, 543 and 506401, that added together give a square (506944 = 712²).

The spelling of 543506401 in words is "five hundred forty-three million, five hundred six thousand, four hundred one".