220940191 has 8 divisors (see below), whose sum is σ = 225536400. Its totient is φ = 216372480.

The previous prime is 220940179. The next prime is 220940197. The reversal of 220940191 is 191049022.

It is a happy number.

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 220940191 - 2¹¹ = 220938143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220940197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8911 + ... + 22831.

It is an arithmetic number, because the mean of its divisors is an integer number (28192050).

Almost surely, 2^220940191 is an apocalyptic number.

220940191 is a deficient number, since it is larger than the sum of its proper divisors (4596209).

220940191 is a wasteful number, since it uses less digits than its factorization.

220940191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14249.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 220940191 is about 14864.0570168444. The cubic root of 220940191 is about 604.5398144330.

The spelling of 220940191 in words is "two hundred twenty million, nine hundred forty thousand, one hundred ninety-one".