2217472 has 40 divisors (see below), whose sum is σ = 4566672. Its totient is φ = 1075200.

The previous prime is 2217443. The next prime is 2217473. The reversal of 2217472 is 2747122.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2217473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31197 + ... + 31267.

2^2217472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2217472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2283336).

2217472 is an abundant number, since it is smaller than the sum of its proper divisors (2349200).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2217472 is an frugal number, since it uses more digits than its factorization.

2217472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150 (or 134 counting only the distinct ones).

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

The square root of 2217472 is about 1489.1178596740. The cubic root of 2217472 is about 130.4025392507.

The spelling of 2217472 in words is "two million, two hundred seventeen thousand, four hundred seventy-two".