144220421444 has 24 divisors (see below), whose sum is σ = 279843505536. Its totient is φ = 64480068000.

The previous prime is 144220421413. The next prime is 144220421459. The reversal of 144220421444 is 444124022441.

It is a super-2 number, since 2×144220421444² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 144220421444.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 26864012 + ... + 26869379.

It is an arithmetic number, because the mean of its divisors is an integer number (11660146064).

Almost surely, 2^144220421444 is an apocalyptic number.

It is an amenable number.

144220421444 is a deficient number, since it is larger than the sum of its proper divisors (135623084092).

144220421444 is a wasteful number, since it uses less digits than its factorization.

144220421444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53733467 (or 53733465 counting only the distinct ones).

The product of its (nonzero) digits is 32768, while the sum is 32.

Adding to 144220421444 its reverse (444124022441), we get a palindrome (588344443885).

The spelling of 144220421444 in words is "one hundred forty-four billion, two hundred twenty million, four hundred twenty-one thousand, four hundred forty-four".