2217249 has 6 divisors (see below), whose sum is σ = 3202706. Its totient is φ = 1478160.

The previous prime is 2217247. The next prime is 2217251. The reversal of 2217249 is 9427122.

It is an interprime number because it is at equal distance from previous prime (2217247) and next prime (2217251).

It can be written as a sum of positive squares in only one way, i.e., 2030625 + 186624 = 1425^2 + 432^2 .

It is not a de Polignac number, because 2217249 - 2¹ = 2217247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2217247) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 123172 + ... + 123189.

2^2217249 is an apocalyptic number.

It is an amenable number.

2217249 is a deficient number, since it is larger than the sum of its proper divisors (985457).

2217249 is a wasteful number, since it uses less digits than its factorization.

2217249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246367 (or 246364 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 2217249 is about 1489.0429812467. The cubic root of 2217249 is about 130.3981677952.

It can be divided in two parts, 22 and 17249, that added together give a palindrome (17271).

The spelling of 2217249 in words is "two million, two hundred seventeen thousand, two hundred forty-nine".