144115221 has 4 divisors (see below), whose sum is σ = 192153632. Its totient is φ = 96076812.

The previous prime is 144115219. The next prime is 144115243. The reversal of 144115221 is 122511441.

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 144115221 - 2¹ = 144115219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144115201) 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 in 3 ways as a sum of consecutive naturals, for example, 24019201 + ... + 24019206.

It is an arithmetic number, because the mean of its divisors is an integer number (48038408).

Almost surely, 2^144115221 is an apocalyptic number.

It is an amenable number.

144115221 is a deficient number, since it is larger than the sum of its proper divisors (48038411).

144115221 is an equidigital number, since it uses as much as digits as its factorization.

144115221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48038410.

The product of its digits is 320, while the sum is 21.

The square root of 144115221 is about 12004.7999150340. The cubic root of 144115221 is about 524.2880399258.

Adding to 144115221 its reverse (122511441), we get a palindrome (266626662).

The spelling of 144115221 in words is "one hundred forty-four million, one hundred fifteen thousand, two hundred twenty-one".