5511730021 has 16 divisors (see below), whose sum is σ = 6677821440. Its totient is φ = 4440994560.

The previous prime is 5511730013. The next prime is 5511730057. The reversal of 5511730021 is 1200371155.

5511730021 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 5511730021 - 2³ = 5511730013 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 (5511730001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70716 + ... + 126586.

It is an arithmetic number, because the mean of its divisors is an integer number (417363840).

Almost surely, 2^5511730021 is an apocalyptic number.

It is an amenable number.

5511730021 is a deficient number, since it is larger than the sum of its proper divisors (1166091419).

5511730021 is a wasteful number, since it uses less digits than its factorization.

5511730021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56724.

The product of its (nonzero) digits is 1050, while the sum is 25.

The square root of 5511730021 is about 74241.0265351982. The cubic root of 5511730021 is about 1766.4281572203.

The spelling of 5511730021 in words is "five billion, five hundred eleven million, seven hundred thirty thousand, twenty-one".