144441440231421 has 4 divisors (see below), whose sum is σ = 192588586975232. Its totient is φ = 96294293487612.

The previous prime is 144441440231419. The next prime is 144441440231467. The reversal of 144441440231421 is 124132044144441.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 144441440231421 - 2¹ = 144441440231419 is a prime.

It is a super-2 number, since 2×144441440231421² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 144441440231421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144441440231021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24073573371901 + ... + 24073573371906.

It is an arithmetic number, because the mean of its divisors is an integer number (48147146743808).

Almost surely, 2^{144441440231421} is an apocalyptic number.

It is an amenable number.

144441440231421 is a deficient number, since it is larger than the sum of its proper divisors (48147146743811).

144441440231421 is an equidigital number, since it uses as much as digits as its factorization.

144441440231421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48147146743810.

The product of its (nonzero) digits is 196608, while the sum is 39.

Adding to 144441440231421 its reverse (124132044144441), we get a palindrome (268573484375862).

The spelling of 144441440231421 in words is "one hundred forty-four trillion, four hundred forty-one billion, four hundred forty million, two hundred thirty-one thousand, four hundred twenty-one".