144220155 has 16 divisors (see below), whose sum is σ = 235107360. Its totient is φ = 75465728.

The previous prime is 144220133. The next prime is 144220157. The reversal of 144220155 is 551022441.

It is a cyclic number.

It is not a de Polignac number, because 144220155 - 2⁵ = 144220123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (144220157) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 89910 + ... + 91499.

It is an arithmetic number, because the mean of its divisors is an integer number (14694210).

Almost surely, 2^144220155 is an apocalyptic number.

144220155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

144220155 is a deficient number, since it is larger than the sum of its proper divisors (90887205).

144220155 is a wasteful number, since it uses less digits than its factorization.

144220155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181470.

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 144220155 is about 12009.1696215850. The cubic root of 144220155 is about 524.4152582571.

Adding to 144220155 its reverse (551022441), we get a palindrome (695242596).

The spelling of 144220155 in words is "one hundred forty-four million, two hundred twenty thousand, one hundred fifty-five".