543213204406621 has 16 divisors (see below), whose sum is σ = 640760326433280. Its totient is φ = 450887964951600.

The previous prime is 543213204406571. The next prime is 543213204406627. The reversal of 543213204406621 is 126604402312345.

It is a cyclic number.

It is not a de Polignac number, because 543213204406621 - 2¹⁷ = 543213204275549 is a prime.

It is a super-2 number, since 2×543213204406621² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (543213204406627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9815541055 + ... + 9815596396.

It is an arithmetic number, because the mean of its divisors is an integer number (40047520402080).

Almost surely, 2^{543213204406621} is an apocalyptic number.

It is an amenable number.

543213204406621 is a deficient number, since it is larger than the sum of its proper divisors (97547122026659).

543213204406621 is a wasteful number, since it uses less digits than its factorization.

543213204406621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19631137584.

The product of its (nonzero) digits is 829440, while the sum is 43.

Adding to 543213204406621 its reverse (126604402312345), we get a palindrome (669817606718966).

The spelling of 543213204406621 in words is "five hundred forty-three trillion, two hundred thirteen billion, two hundred four million, four hundred six thousand, six hundred twenty-one".