221422193 has 2 divisors, whose sum is σ = 221422194. Its totient is φ = 221422192.

The previous prime is 221422177. The next prime is 221422207. The reversal of 221422193 is 391224122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 210018064 + 11404129 = 14492^2 + 3377^2 .

It is a cyclic number.

It is not a de Polignac number, because 221422193 - 2⁴ = 221422177 is a prime.

It is not a weakly prime, because it can be changed into another prime (221422133) by changing a digit.

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 as a sum of consecutive naturals, namely, 110711096 + 110711097.

It is an arithmetic number, because the mean of its divisors is an integer number (110711097).

Almost surely, 2^221422193 is an apocalyptic number.

It is an amenable number.

221422193 is a deficient number, since it is larger than the sum of its proper divisors (1).

221422193 is an equidigital number, since it uses as much as digits as its factorization.

221422193 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 26.

The square root of 221422193 is about 14880.2618592550. The cubic root of 221422193 is about 604.9791154597.

The spelling of 221422193 in words is "two hundred twenty-one million, four hundred twenty-two thousand, one hundred ninety-three".