2217616 has 40 divisors (see below), whose sum is σ = 4713984. Its totient is φ = 1006080.

The previous prime is 2217587. The next prime is 2217617. The reversal of 2217616 is 6167122.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (2217617) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8301 + ... + 8563.

2^2217616 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 2217616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2356992).

2217616 is an abundant number, since it is smaller than the sum of its proper divisors (2496368).

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

2217616 is a wasteful number, since it uses less digits than its factorization.

2217616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319 (or 313 counting only the distinct ones).

The product of its digits is 1008, while the sum is 25.

The square root of 2217616 is about 1489.1662096623. The cubic root of 2217616 is about 130.4053619184.

The spelling of 2217616 in words is "two million, two hundred seventeen thousand, six hundred sixteen".