220221193 has 2 divisors, whose sum is σ = 220221194. Its totient is φ = 220221192.

The previous prime is 220221187. The next prime is 220221223. The reversal of 220221193 is 391122022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 194546704 + 25674489 = 13948^2 + 5067^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220221193 is a prime.

It is not a weakly prime, because it can be changed into another prime (220221143) 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 as a sum of consecutive naturals, namely, 110110596 + 110110597.

It is an arithmetic number, because the mean of its divisors is an integer number (110110597).

Almost surely, 2^220221193 is an apocalyptic number.

It is an amenable number.

220221193 is a deficient number, since it is larger than the sum of its proper divisors (1).

220221193 is an equidigital number, since it uses as much as digits as its factorization.

220221193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 220221193 is about 14839.8515154297. The cubic root of 220221193 is about 603.8833241363.

The spelling of 220221193 in words is "two hundred twenty million, two hundred twenty-one thousand, one hundred ninety-three".