5520656021 has 4 divisors (see below), whose sum is σ = 5711023500. Its totient is φ = 5330288544.

The previous prime is 5520655993. The next prime is 5520656033. The reversal of 5520656021 is 1206560255.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1206560255 = 5 ⋅241312051.

It can be written as a sum of positive squares in 2 ways, for example, as 4169284900 + 1351371121 = 64570^2 + 36761^2 .

It is a cyclic number.

It is not a de Polignac number, because 5520656021 - 2¹⁸ = 5520393877 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 (5520650021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95183696 + ... + 95183753.

It is an arithmetic number, because the mean of its divisors is an integer number (1427755875).

Almost surely, 2^5520656021 is an apocalyptic number.

It is an amenable number.

5520656021 is a deficient number, since it is larger than the sum of its proper divisors (190367479).

5520656021 is a wasteful number, since it uses less digits than its factorization.

5520656021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190367478.

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 5520656021 is about 74301.1172257860. The cubic root of 5520656021 is about 1767.3811933771.

The spelling of 5520656021 in words is "five billion, five hundred twenty million, six hundred fifty-six thousand, twenty-one".