2217312 has 36 divisors (see below), whose sum is σ = 6306300. Its totient is φ = 739008.

The previous prime is 2217301. The next prime is 2217317. The reversal of 2217312 is 2137122.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2217317) 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, 3562 + ... + 4137.

It is an arithmetic number, because the mean of its divisors is an integer number (175175).

2^2217312 is an apocalyptic number.

It is an amenable number.

2217312 is an abundant number, since it is smaller than the sum of its proper divisors (4088988).

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

2217312 is a wasteful number, since it uses less digits than its factorization.

2217312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7715 (or 7704 counting only the distinct ones).

The product of its digits is 168, while the sum is 18.

The square root of 2217312 is about 1489.0641356234. The cubic root of 2217312 is about 130.3994028101.

The spelling of 2217312 in words is "two million, two hundred seventeen thousand, three hundred twelve".