221158 has 8 divisors (see below), whose sum is σ = 379152. Its totient is φ = 94776.

The previous prime is 221101. The next prime is 221159. The reversal of 221158 is 851122.

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

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221159) by changing a digit.

221158 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7885 + ... + 7912.

It is an arithmetic number, because the mean of its divisors is an integer number (47394).

2²²¹¹⁵⁸ is an apocalyptic number.

221158 is a deficient number, since it is larger than the sum of its proper divisors (157994).

221158 is a wasteful number, since it uses less digits than its factorization.

221158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15806.

The product of its digits is 160, while the sum is 19.

The square root of 221158 is about 470.2743879907. The cubic root of 221158 is about 60.4738406589.

The spelling of 221158 in words is "two hundred twenty-one thousand, one hundred fifty-eight".