2297221 has 2 divisors, whose sum is σ = 2297222. Its totient is φ = 2297220.

The previous prime is 2297213. The next prime is 2297231. The reversal of 2297221 is 1227922.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1822500 + 474721 = 1350^2 + 689^2 .

It is a cyclic number.

It is not a de Polignac number, because 2297221 - 2³ = 2297213 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2297231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1148610 + 1148611.

It is an arithmetic number, because the mean of its divisors is an integer number (1148611).

2^2297221 is an apocalyptic number.

It is an amenable number.

2297221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2297221 is an equidigital number, since it uses as much as digits as its factorization.

2297221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1008, while the sum is 25.

The square root of 2297221 is about 1515.6586027203. The cubic root of 2297221 is about 131.9474270285.

The spelling of 2297221 in words is "two million, two hundred ninety-seven thousand, two hundred twenty-one".