2225550221 has 4 divisors (see below), whose sum is σ = 2225995200. Its totient is φ = 2225105244.

The previous prime is 2225550211. The next prime is 2225550227. The reversal of 2225550221 is 1220555222.

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 2225550221 - 2²⁶ = 2158441357 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2225550227) 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, 214901 + ... + 225018.

It is an arithmetic number, because the mean of its divisors is an integer number (556498800).

Almost surely, 2^2225550221 is an apocalyptic number.

It is an amenable number.

2225550221 is a deficient number, since it is larger than the sum of its proper divisors (444979).

2225550221 is an equidigital number, since it uses as much as digits as its factorization.

2225550221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444978.

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

The square root of 2225550221 is about 47175.7376306932. The cubic root of 2225550221 is about 1305.6069892006.

The spelling of 2225550221 in words is "two billion, two hundred twenty-five million, five hundred fifty thousand, two hundred twenty-one".