5500445221 has 4 divisors (see below), whose sum is σ = 5514162444. Its totient is φ = 5486728000.

The previous prime is 5500445191. The next prime is 5500445257. The reversal of 5500445221 is 1225440055.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3756464100 + 1743981121 = 61290^2 + 41761^2 .

It is a cyclic number.

It is not a de Polignac number, because 5500445221 - 2²¹ = 5498348069 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 5500445221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5500445021) 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, 6858010 + ... + 6858811.

It is an arithmetic number, because the mean of its divisors is an integer number (1378540611).

Almost surely, 2^5500445221 is an apocalyptic number.

It is an amenable number.

5500445221 is a deficient number, since it is larger than the sum of its proper divisors (13717223).

5500445221 is a wasteful number, since it uses less digits than its factorization.

5500445221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13717222.

The product of its (nonzero) digits is 8000, while the sum is 28.

The square root of 5500445221 is about 74164.9864895828. The cubic root of 5500445221 is about 1765.2217962329.

Adding to 5500445221 its reverse (1225440055), we get a palindrome (6725885276).

The spelling of 5500445221 in words is "five billion, five hundred million, four hundred forty-five thousand, two hundred twenty-one".