221299 has 8 divisors (see below), whose sum is σ = 246960. Its totient is φ = 196896.

The previous prime is 221281. The next prime is 221303. The reversal of 221299 is 992122.

221299 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 221299 - 2⁷ = 221171 is a prime.

It is a Duffinian number.

221299 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (221209) 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, 84 + ... + 670.

It is an arithmetic number, because the mean of its divisors is an integer number (30870).

2²²¹²⁹⁹ is an apocalyptic number.

221299 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

221299 is a deficient number, since it is larger than the sum of its proper divisors (25661).

221299 is a wasteful number, since it uses less digits than its factorization.

221299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629.

The product of its digits is 648, while the sum is 25.

The square root of 221299 is about 470.4242765844. The cubic root of 221299 is about 60.4866896931.

The spelling of 221299 in words is "two hundred twenty-one thousand, two hundred ninety-nine".