4550520221 has 16 divisors (see below), whose sum is σ = 5043360000. Its totient is φ = 4078548288.

The previous prime is 4550520217. The next prime is 4550520223. The reversal of 4550520221 is 1220250554.

It is a cyclic number.

It is not a de Polignac number, because 4550520221 - 2² = 4550520217 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 (4550520223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 230540 + ... + 249498.

It is an arithmetic number, because the mean of its divisors is an integer number (315210000).

Almost surely, 2^4550520221 is an apocalyptic number.

It is an amenable number.

4550520221 is a deficient number, since it is larger than the sum of its proper divisors (492839779).

4550520221 is a wasteful number, since it uses less digits than its factorization.

4550520221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19508.

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 4550520221 is about 67457.5438405520. The cubic root of 4550520221 is about 1657.1189467004.

Adding to 4550520221 its reverse (1220250554), we get a palindrome (5770770775).

The spelling of 4550520221 in words is "four billion, five hundred fifty million, five hundred twenty thousand, two hundred twenty-one".