221298 has 32 divisors (see below), whose sum is σ = 552960. Its totient is φ = 57360.

The previous prime is 221281. The next prime is 221303. The reversal of 221298 is 892122.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 221298.

It is an unprimeable number.

221298 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 223 + ... + 701.

It is an arithmetic number, because the mean of its divisors is an integer number (17280).

2²²¹²⁹⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221298, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (276480).

221298 is an abundant number, since it is smaller than the sum of its proper divisors (331662).

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

221298 is a wasteful number, since it uses less digits than its factorization.

221298 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502.

The product of its digits is 576, while the sum is 24.

The square root of 221298 is about 470.4232137129. The cubic root of 221298 is about 60.4865985844.

The spelling of 221298 in words is "two hundred twenty-one thousand, two hundred ninety-eight".