2221663447 has 2 divisors, whose sum is σ = 2221663448. Its totient is φ = 2221663446.

The previous prime is 2221663429. The next prime is 2221663469. The reversal of 2221663447 is 7443661222.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2221663447 - 2¹¹ = 2221661399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2221663427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110831723 + 1110831724.

It is an arithmetic number, because the mean of its divisors is an integer number (1110831724).

Almost surely, 2^2221663447 is an apocalyptic number.

2221663447 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221663447 is an equidigital number, since it uses as much as digits as its factorization.

2221663447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 37.

The square root of 2221663447 is about 47134.5250002586. The cubic root of 2221663447 is about 1304.8464946690.

The spelling of 2221663447 in words is "two billion, two hundred twenty-one million, six hundred sixty-three thousand, four hundred forty-seven".