4221816887 has 2 divisors, whose sum is σ = 4221816888. Its totient is φ = 4221816886.

The previous prime is 4221816869. The next prime is 4221816889. The reversal of 4221816887 is 7886181224.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4221816887 - 2⁸ = 4221816631 is a prime.

Together with 4221816889, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4221816889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2110908443 + 2110908444.

It is an arithmetic number, because the mean of its divisors is an integer number (2110908444).

Almost surely, 2^4221816887 is an apocalyptic number.

4221816887 is a deficient number, since it is larger than the sum of its proper divisors (1).

4221816887 is an equidigital number, since it uses as much as digits as its factorization.

4221816887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 344064, while the sum is 47.

The square root of 4221816887 is about 64975.5099018084. The cubic root of 4221816887 is about 1616.2174727695.

The spelling of 4221816887 in words is "four billion, two hundred twenty-one million, eight hundred sixteen thousand, eight hundred eighty-seven".