144013221 has 28 divisors (see below), whose sum is σ = 235563360. Its totient is φ = 87275880.

The previous prime is 144013187. The next prime is 144013229. The reversal of 144013221 is 122310441.

144013221 is a `hidden beast` number, since 1 + 440 + 1 + 3 + 221 = 666.

It is not a de Polignac number, because 144013221 - 2⁶ = 144013157 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 144013194 and 144013203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144013229) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 961 + ... + 16998.

Almost surely, 2^144013221 is an apocalyptic number.

144013221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

144013221 is a deficient number, since it is larger than the sum of its proper divisors (91550139).

144013221 is an equidigital number, since it uses as much as digits as its factorization.

144013221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17988 (or 17973 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 144013221 is about 12000.5508623563. The cubic root of 144013221 is about 524.1643194722.

Adding to 144013221 its reverse (122310441), we get a palindrome (266323662).

The spelling of 144013221 in words is "one hundred forty-four million, thirteen thousand, two hundred twenty-one".