2225221 has 2 divisors, whose sum is σ = 2225222. Its totient is φ = 2225220.

The previous prime is 2225203. The next prime is 2225231. The reversal of 2225221 is 1225222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2217121 + 8100 = 1489^2 + 90^2 .

It is a cyclic number.

It is not a de Polignac number, because 2225221 - 2⁹ = 2224709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2225195 and 2225204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2225231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1112610 + 1112611.

It is an arithmetic number, because the mean of its divisors is an integer number (1112611).

2^2225221 is an apocalyptic number.

It is an amenable number.

2225221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2225221 is an equidigital number, since it uses as much as digits as its factorization.

2225221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 160, while the sum is 16.

The square root of 2225221 is about 1491.7174665465. The cubic root of 2225221 is about 130.5542607453.

Subtracting from 2225221 its reverse (1225222), we obtain a palindrome (999999).

The spelling of 2225221 in words is "two million, two hundred twenty-five thousand, two hundred twenty-one".