543385921 has 16 divisors (see below), whose sum is σ = 617077440. Its totient is φ = 474344640.

The previous prime is 543385919. The next prime is 543385951. The reversal of 543385921 is 129583345.

It is a cyclic number.

It is not a de Polignac number, because 543385921 - 2¹ = 543385919 is a prime.

It is a super-3 number, since 3×543385921³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (543385951) 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 15 ways as a sum of consecutive naturals, for example, 167091 + ... + 170311.

It is an arithmetic number, because the mean of its divisors is an integer number (38567340).

Almost surely, 2^543385921 is an apocalyptic number.

It is an amenable number.

543385921 is a deficient number, since it is larger than the sum of its proper divisors (73691519).

543385921 is a wasteful number, since it uses less digits than its factorization.

543385921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3936.

The product of its digits is 129600, while the sum is 40.

The square root of 543385921 is about 23310.6396523133. The cubic root of 543385921 is about 816.0237406788.

The spelling of 543385921 in words is "five hundred forty-three million, three hundred eighty-five thousand, nine hundred twenty-one".