144442221 has 64 divisors (see below), whose sum is σ = 250048512. Its totient is φ = 72000000.

The previous prime is 144442213. The next prime is 144442223. The reversal of 144442221 is 122244441.

It is not a de Polignac number, because 144442221 - 2³ = 144442213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 144442191 and 144442200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144442223) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 956496 + ... + 956646.

It is an arithmetic number, because the mean of its divisors is an integer number (3907008).

Almost surely, 2^144442221 is an apocalyptic number.

144442221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

144442221 is a deficient number, since it is larger than the sum of its proper divisors (105606291).

144442221 is a wasteful number, since it uses less digits than its factorization.

144442221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314.

The product of its digits is 2048, while the sum is 24.

The square root of 144442221 is about 12018.4117503104. The cubic root of 144442221 is about 524.6842800144.

Adding to 144442221 its reverse (122244441), we get a palindrome (266686662).

The spelling of 144442221 in words is "one hundred forty-four million, four hundred forty-two thousand, two hundred twenty-one".