2221663471 has 2 divisors, whose sum is σ = 2221663472. Its totient is φ = 2221663470.

The previous prime is 2221663469. The next prime is 2221663481. The reversal of 2221663471 is 1743661222.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2221663471 - 2¹ = 2221663469 is a prime.

It is a super-3 number, since 3×2221663471³ (a number of 29 digits) contains 333 as substring.

Together with 2221663469, 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 (2221663421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110831735 + 1110831736.

It is an arithmetic number, because the mean of its divisors is an integer number (1110831736).

Almost surely, 2^2221663471 is an apocalyptic number.

2221663471 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221663471 is an equidigital number, since it uses as much as digits as its factorization.

2221663471 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 34.

The square root of 2221663471 is about 47134.5252548490. The cubic root of 2221663471 is about 1304.8464993676.

The spelling of 2221663471 in words is "two billion, two hundred twenty-one million, six hundred sixty-three thousand, four hundred seventy-one".