5543821 has 8 divisors (see below), whose sum is σ = 5725080. Its totient is φ = 5364288.

The previous prime is 5543779. The next prime is 5543831. The reversal of 5543821 is 1283455.

5543821 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 72900 + 5470921 = 270^2 + 2339^2 .

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 5543821 - 2²¹ = 3446669 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 5543821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5543831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9675 + ... + 10231.

It is an arithmetic number, because the mean of its divisors is an integer number (715635).

Almost surely, 2^5543821 is an apocalyptic number.

It is an amenable number.

5543821 is a deficient number, since it is larger than the sum of its proper divisors (181259).

5543821 is a wasteful number, since it uses less digits than its factorization.

5543821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 863.

The product of its digits is 4800, while the sum is 28.

The square root of 5543821 is about 2354.5320129486. The cubic root of 5543821 is about 176.9849753704.

The spelling of 5543821 in words is "five million, five hundred forty-three thousand, eight hundred twenty-one".