2221663469 has 2 divisors, whose sum is σ = 2221663470. Its totient is φ = 2221663468.

The previous prime is 2221663447. The next prime is 2221663471. The reversal of 2221663469 is 9643661222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1777718569 + 443944900 = 42163^2 + 21070^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2221663469 is a prime.

It is a super-2 number, since 2×2221663469² = 9871577138978227922, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 2221663471, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2221663429) 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, 1110831734 + 1110831735.

It is an arithmetic number, because the mean of its divisors is an integer number (1110831735).

Almost surely, 2^2221663469 is an apocalyptic number.

It is an amenable number.

2221663469 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221663469 is an equidigital number, since it uses as much as digits as its factorization.

2221663469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 186624, while the sum is 41.

The square root of 2221663469 is about 47134.5252336331. The cubic root of 2221663469 is about 1304.8464989761.

The spelling of 2221663469 in words is "two billion, two hundred twenty-one million, six hundred sixty-three thousand, four hundred sixty-nine".