144221155 has 16 divisors (see below), whose sum is σ = 194483520. Its totient is φ = 101870208.

The previous prime is 144221131. The next prime is 144221167. The reversal of 144221155 is 551122441.

It is a cyclic number.

It is not a de Polignac number, because 144221155 - 2⁷ = 144221027 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46740 + ... + 49729.

It is an arithmetic number, because the mean of its divisors is an integer number (12155220).

Almost surely, 2^144221155 is an apocalyptic number.

144221155 is a deficient number, since it is larger than the sum of its proper divisors (50262365).

144221155 is a wasteful number, since it uses less digits than its factorization.

144221155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96510.

The product of its digits is 1600, while the sum is 25.

The square root of 144221155 is about 12009.2112563648. The cubic root of 144221155 is about 524.4164703255.

Adding to 144221155 its reverse (551122441), we get a palindrome (695343596).

The spelling of 144221155 in words is "one hundred forty-four million, two hundred twenty-one thousand, one hundred fifty-five".