221358 has 16 divisors (see below), whose sum is σ = 449280. Its totient is φ = 72696.

The previous prime is 221327. The next prime is 221393. The reversal of 221358 is 853122.

221358 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 221358.

It is an unprimeable number.

221358 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 7 ways as a sum of consecutive naturals, for example, 241 + ... + 707.

It is an arithmetic number, because the mean of its divisors is an integer number (28080).

2²²¹³⁵⁸ is an apocalyptic number.

221358 is an abundant number, since it is smaller than the sum of its proper divisors (227922).

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

221358 is a wasteful number, since it uses less digits than its factorization.

221358 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551.

The product of its digits is 480, while the sum is 21.

The square root of 221358 is about 470.4869817540. The cubic root of 221358 is about 60.4920646196.

The spelling of 221358 in words is "two hundred twenty-one thousand, three hundred fifty-eight".