221889 has 8 divisors (see below), whose sum is σ = 304000. Its totient is φ = 143856.

The previous prime is 221873. The next prime is 221891. The reversal of 221889 is 988122.

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

It is not a de Polignac number, because 221889 - 2⁴ = 221873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221849) 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, 889 + ... + 1110.

It is an arithmetic number, because the mean of its divisors is an integer number (38000).

2²²¹⁸⁸⁹ is an apocalyptic number.

It is an amenable number.

221889 is a deficient number, since it is larger than the sum of its proper divisors (82111).

221889 is a wasteful number, since it uses less digits than its factorization.

221889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2039.

The product of its digits is 2304, while the sum is 30.

The square root of 221889 is about 471.0509526580. The cubic root of 221889 is about 60.5403960344.

The spelling of 221889 in words is "two hundred twenty-one thousand, eight hundred eighty-nine".