5543440021 has 6 divisors (see below), whose sum is σ = 6448491510. Its totient is φ = 4751519976.

The previous prime is 5543439989. The next prime is 5543440093. The reversal of 5543440021 is 1200443455.

It can be written as a sum of positive squares in only one way, i.e., 4102402500 + 1441037521 = 64050^2 + 37961^2 .

It is not a de Polignac number, because 5543440021 - 2⁵ = 5543439989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5543440421) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 56565666 + ... + 56565763.

It is an arithmetic number, because the mean of its divisors is an integer number (1074748585).

Almost surely, 2^5543440021 is an apocalyptic number.

It is an amenable number.

5543440021 is a deficient number, since it is larger than the sum of its proper divisors (905051489).

5543440021 is a wasteful number, since it uses less digits than its factorization.

5543440021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113131443 (or 113131436 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 5543440021 is about 74454.2814148387. The cubic root of 5543440021 is about 1769.8092106057.

Adding to 5543440021 its reverse (1200443455), we get a palindrome (6743883476).

The spelling of 5543440021 in words is "five billion, five hundred forty-three million, four hundred forty thousand, twenty-one".