2217724 has 6 divisors (see below), whose sum is σ = 3881024. Its totient is φ = 1108860.

The previous prime is 2217673. The next prime is 2217749. The reversal of 2217724 is 4277122.

It is a congruent number.

It is an unprimeable number.

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, 277212 + ... + 277219.

2^2217724 is an apocalyptic number.

It is an amenable number.

2217724 is a deficient number, since it is larger than the sum of its proper divisors (1663300).

2217724 is a wasteful number, since it uses less digits than its factorization.

2217724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554435 (or 554433 counting only the distinct ones).

The product of its digits is 1568, while the sum is 25.

The square root of 2217724 is about 1489.2024711234. The cubic root of 2217724 is about 130.4074788389.

It can be divided in two parts, 22177 and 24, that added together give a square (22201 = 149²).

The spelling of 2217724 in words is "two million, two hundred seventeen thousand, seven hundred twenty-four".