2273221 has 4 divisors (see below), whose sum is σ = 2293452. Its totient is φ = 2252992.

The previous prime is 2273213. The next prime is 2273231. The reversal of 2273221 is 1223722.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 202500 + 2070721 = 450^2 + 1439^2 .

It is a cyclic number.

It is not a de Polignac number, because 2273221 - 2³ = 2273213 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 (2273231) 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, 9946 + ... + 10171.

It is an arithmetic number, because the mean of its divisors is an integer number (573363).

2^2273221 is an apocalyptic number.

It is an amenable number.

2273221 is a deficient number, since it is larger than the sum of its proper divisors (20231).

2273221 is a wasteful number, since it uses less digits than its factorization.

2273221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20230.

The product of its digits is 336, while the sum is 19.

The square root of 2273221 is about 1507.7204648077. The cubic root of 2273221 is about 131.4863147001.

Adding to 2273221 its reverse (1223722), we get a palindrome (3496943).

The spelling of 2273221 in words is "two million, two hundred seventy-three thousand, two hundred twenty-one".