5550221 has 4 divisors (see below), whose sum is σ = 5599452. Its totient is φ = 5500992.

The previous prime is 5550217. The next prime is 5550229. The reversal of 5550221 is 1220555.

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 2292196 + 3258025 = 1514^2 + 1805^2 .

It is a cyclic number.

It is not a de Polignac number, because 5550221 - 2² = 5550217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5550193 and 5550202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5550229) 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, 24446 + ... + 24671.

It is an arithmetic number, because the mean of its divisors is an integer number (1399863).

Almost surely, 2^5550221 is an apocalyptic number.

It is an amenable number.

5550221 is a deficient number, since it is larger than the sum of its proper divisors (49231).

5550221 is a wasteful number, since it uses less digits than its factorization.

5550221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49230.

The product of its (nonzero) digits is 500, while the sum is 20.

The square root of 5550221 is about 2355.8907020488. The cubic root of 5550221 is about 177.0530552647.

Adding to 5550221 its reverse (1220555), we get a palindrome (6770776).

The spelling of 5550221 in words is "five million, five hundred fifty thousand, two hundred twenty-one".