220371191 has 4 divisors (see below), whose sum is σ = 224529192. Its totient is φ = 216213192.

The previous prime is 220371163. The next prime is 220371197. The reversal of 220371191 is 191173022.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220371191 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 220371191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220371197) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2078921 + ... + 2079026.

It is an arithmetic number, because the mean of its divisors is an integer number (56132298).

Almost surely, 2^220371191 is an apocalyptic number.

220371191 is a deficient number, since it is larger than the sum of its proper divisors (4158001).

220371191 is an equidigital number, since it uses as much as digits as its factorization.

220371191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4158000.

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 220371191 is about 14844.9045466786. The cubic root of 220371191 is about 604.0203995493.

The spelling of 220371191 in words is "two hundred twenty million, three hundred seventy-one thousand, one hundred ninety-one".