144221447 has 2 divisors, whose sum is σ = 144221448. Its totient is φ = 144221446.

The previous prime is 144221423. The next prime is 144221503. The reversal of 144221447 is 744122441.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 144221447 - 2⁶ = 144221383 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144221747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72110723 + 72110724.

It is an arithmetic number, because the mean of its divisors is an integer number (72110724).

Almost surely, 2^144221447 is an apocalyptic number.

144221447 is a deficient number, since it is larger than the sum of its proper divisors (1).

144221447 is an equidigital number, since it uses as much as digits as its factorization.

144221447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7168, while the sum is 29.

The square root of 144221447 is about 12009.2234136933. The cubic root of 144221447 is about 524.4168242483.

Adding to 144221447 its reverse (744122441), we get a palindrome (888343888).

The spelling of 144221447 in words is "one hundred forty-four million, two hundred twenty-one thousand, four hundred forty-seven".