221544342319 has 2 divisors, whose sum is σ = 221544342320. Its totient is φ = 221544342318.

The previous prime is 221544342311. The next prime is 221544342367. The reversal of 221544342319 is 913243445122.

221544342319 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221544342319 - 2³ = 221544342311 is a prime.

It is a super-2 number, since 2×221544342319² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221544342311) 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, 110772171159 + 110772171160.

It is an arithmetic number, because the mean of its divisors is an integer number (110772171160).

Almost surely, 2^221544342319 is an apocalyptic number.

221544342319 is a deficient number, since it is larger than the sum of its proper divisors (1).

221544342319 is an equidigital number, since it uses as much as digits as its factorization.

221544342319 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 207360, while the sum is 40.

The spelling of 221544342319 in words is "two hundred twenty-one billion, five hundred forty-four million, three hundred forty-two thousand, three hundred nineteen".