221443046017 has 2 divisors, whose sum is σ = 221443046018. Its totient is φ = 221443046016.

The previous prime is 221443046003. The next prime is 221443046051. The reversal of 221443046017 is 710640344122.

It is an a-pointer prime, because the next prime (221443046051) can be obtained adding 221443046017 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 184280459841 + 37162586176 = 429279^2 + 192776^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221443046017 is a prime.

It is not a weakly prime, because it can be changed into another prime (221443046087) 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, 110721523008 + 110721523009.

It is an arithmetic number, because the mean of its divisors is an integer number (110721523009).

Almost surely, 2^221443046017 is an apocalyptic number.

It is an amenable number.

221443046017 is a deficient number, since it is larger than the sum of its proper divisors (1).

221443046017 is an equidigital number, since it uses as much as digits as its factorization.

221443046017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 34.

The spelling of 221443046017 in words is "two hundred twenty-one billion, four hundred forty-three million, forty-six thousand, seventeen".