5520221 has 4 divisors (see below), whose sum is σ = 6308832. Its totient is φ = 4731612.

The previous prime is 5520191. The next prime is 5520233. The reversal of 5520221 is 1220255.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5520221 - 2⁶ = 5520157 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 5520221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5520271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 394295 + ... + 394308.

It is an arithmetic number, because the mean of its divisors is an integer number (1577208).

Almost surely, 2^5520221 is an apocalyptic number.

It is an amenable number.

5520221 is a deficient number, since it is larger than the sum of its proper divisors (788611).

5520221 is an equidigital number, since it uses as much as digits as its factorization.

5520221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788610.

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 5520221 is about 2349.5150563467. The cubic root of 5520221 is about 176.7334769659.

Adding to 5520221 its reverse (1220255), we get a palindrome (6740476).

The spelling of 5520221 in words is "five million, five hundred twenty thousand, two hundred twenty-one".