2217871 has 8 divisors (see below), whose sum is σ = 2361744. Its totient is φ = 2075520.

The previous prime is 2217863. The next prime is 2217881. The reversal of 2217871 is 1787122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2217871 - 2³ = 2217863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2217881) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 4581 + ... + 5041.

It is an arithmetic number, because the mean of its divisors is an integer number (295218).

2^2217871 is an apocalyptic number.

2217871 is a deficient number, since it is larger than the sum of its proper divisors (143873).

2217871 is a wasteful number, since it uses less digits than its factorization.

2217871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 761.

The product of its digits is 1568, while the sum is 28.

The square root of 2217871 is about 1489.2518255822. The cubic root of 2217871 is about 130.4103600925.

The spelling of 2217871 in words is "two million, two hundred seventeen thousand, eight hundred seventy-one".