2217889 has 4 divisors (see below), whose sum is σ = 2334640. Its totient is φ = 2101140.

The previous prime is 2217881. The next prime is 2217907. The reversal of 2217889 is 9887122.

2217889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2217889 - 2³ = 2217881 is a prime.

It is a Duffinian 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 (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58347 + ... + 58384.

It is an arithmetic number, because the mean of its divisors is an integer number (583660).

2^2217889 is an apocalyptic number.

It is an amenable number.

2217889 is a deficient number, since it is larger than the sum of its proper divisors (116751).

2217889 is a wasteful number, since it uses less digits than its factorization.

2217889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116750.

The product of its digits is 16128, while the sum is 37.

The square root of 2217889 is about 1489.2578688729. The cubic root of 2217889 is about 130.4107128903.

The spelling of 2217889 in words is "two million, two hundred seventeen thousand, eight hundred eighty-nine".