221277217463 has 2 divisors, whose sum is σ = 221277217464. Its totient is φ = 221277217462.

The previous prime is 221277217451. The next prime is 221277217507. The reversal of 221277217463 is 364712772122.

It is a happy number.

221277217463 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (221277217507) can be obtained adding 221277217463 to its sum of digits (44).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221277217463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221277217663) 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, 110638608731 + 110638608732.

It is an arithmetic number, because the mean of its divisors is an integer number (110638608732).

Almost surely, 2^221277217463 is an apocalyptic number.

221277217463 is a deficient number, since it is larger than the sum of its proper divisors (1).

221277217463 is an equidigital number, since it uses as much as digits as its factorization.

221277217463 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 395136, while the sum is 44.

Adding to 221277217463 its reverse (364712772122), we get a palindrome (585989989585).

The spelling of 221277217463 in words is "two hundred twenty-one billion, two hundred seventy-seven million, two hundred seventeen thousand, four hundred sixty-three".