221266063 has 2 divisors, whose sum is σ = 221266064. Its totient is φ = 221266062.

The previous prime is 221266061. The next prime is 221266099. The reversal of 221266063 is 360662122.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221266063 - 2¹ = 221266061 is a prime.

Together with 221266061, 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 (221266061) 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, 110633031 + 110633032.

It is an arithmetic number, because the mean of its divisors is an integer number (110633032).

Almost surely, 2^221266063 is an apocalyptic number.

221266063 is a deficient number, since it is larger than the sum of its proper divisors (1).

221266063 is an equidigital number, since it uses as much as digits as its factorization.

221266063 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 221266063 is about 14875.0147226818. The cubic root of 221266063 is about 604.8368870202.

The spelling of 221266063 in words is "two hundred twenty-one million, two hundred sixty-six thousand, sixty-three".