2207221 has 2 divisors, whose sum is σ = 2207222. Its totient is φ = 2207220.

The previous prime is 2207213. The next prime is 2207237. The reversal of 2207221 is 1227022.

It is an a-pointer prime, because the next prime (2207237) can be obtained adding 2207221 to its sum of digits (16).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1920996 + 286225 = 1386^2 + 535^2 .

It is a cyclic number.

It is not a de Polignac number, because 2207221 - 2³ = 2207213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2207195 and 2207204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2207201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1103610 + 1103611.

It is an arithmetic number, because the mean of its divisors is an integer number (1103611).

2^2207221 is an apocalyptic number.

It is an amenable number.

2207221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2207221 is an equidigital number, since it uses as much as digits as its factorization.

2207221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112, while the sum is 16.

The square root of 2207221 is about 1485.6719018680. The cubic root of 2207221 is about 130.2012858109.

The spelling of 2207221 in words is "two million, two hundred seven thousand, two hundred twenty-one".