220191 has 8 divisors (see below), whose sum is σ = 309120. Its totient is φ = 139032.

The previous prime is 220189. The next prime is 220217. The reversal of 220191 is 191022.

It is a happy number.

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

It is not a de Polignac number, because 220191 - 2¹ = 220189 is a prime.

220191 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 220191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1875 + ... + 1988.

It is an arithmetic number, because the mean of its divisors is an integer number (38640).

2²²⁰¹⁹¹ is an apocalyptic number.

220191 is a deficient number, since it is larger than the sum of its proper divisors (88929).

220191 is a wasteful number, since it uses less digits than its factorization.

220191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3885.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 220191 is about 469.2451384937. The cubic root of 220191 is about 60.3855724791.

The spelling of 220191 in words is "two hundred twenty thousand, one hundred ninety-one".