221414191 has 2 divisors, whose sum is σ = 221414192. Its totient is φ = 221414190.

The previous prime is 221414189. The next prime is 221414209. The reversal of 221414191 is 191414122.

221414191 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221414191 - 2¹ = 221414189 is a prime.

Together with 221414189, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221414161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110707095 + 110707096.

It is an arithmetic number, because the mean of its divisors is an integer number (110707096).

Almost surely, 2^221414191 is an apocalyptic number.

221414191 is a deficient number, since it is larger than the sum of its proper divisors (1).

221414191 is an equidigital number, since it uses as much as digits as its factorization.

221414191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 25.

The square root of 221414191 is about 14879.9929771489. The cubic root of 221414191 is about 604.9718275705.

The spelling of 221414191 in words is "two hundred twenty-one million, four hundred fourteen thousand, one hundred ninety-one".