5520044209 has 3 divisors (see below), whose sum is σ = 5520118507. Its totient is φ = 5519969912.

The previous prime is 5520044119. The next prime is 5520044221. The reversal of 5520044209 is 9024400255.

The square root of 5520044209 is 74297.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 4959680625 + 560363584 = 70425^2 + 23672^2 .

It is not a de Polignac number, because 5520044209 - 2¹¹ = 5520042161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5520044249) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 37149 + ... + 111445.

Almost surely, 2^5520044209 is an apocalyptic number.

5520044209 is the 74297-th square number.

5520044209 is the 37149-th centered octagonal number.

It is an amenable number.

5520044209 is a deficient number, since it is larger than the sum of its proper divisors (74298).

5520044209 is an frugal number, since it uses more digits than its factorization.

5520044209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148594 (or 74297 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

The cubic root of 5520044209 is about 1767.3159025273.

Multiplying 5520044209 by its product of nonzero digits (14400), we get a square (79488636609600 = 8915640²).

The spelling of 5520044209 in words is "five billion, five hundred twenty million, forty-four thousand, two hundred nine".