144534221 has 8 divisors (see below), whose sum is σ = 164808504. Its totient is φ = 125568000.

The previous prime is 144534211. The next prime is 144534239. The reversal of 144534221 is 122435441.

It can be written as a sum of positive squares in 4 ways, for example, as 17724100 + 126810121 = 4210^2 + 11261^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 144534221 - 2⁶ = 144534157 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 (144534211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 326780 + ... + 327221.

It is an arithmetic number, because the mean of its divisors is an integer number (20601063).

Almost surely, 2^144534221 is an apocalyptic number.

It is an amenable number.

144534221 is a deficient number, since it is larger than the sum of its proper divisors (20274283).

144534221 is a wasteful number, since it uses less digits than its factorization.

144534221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654031.

The product of its digits is 3840, while the sum is 26.

The square root of 144534221 is about 12022.2386018578. The cubic root of 144534221 is about 524.7956525955.

Adding to 144534221 its reverse (122435441), we get a palindrome (266969662).

The spelling of 144534221 in words is "one hundred forty-four million, five hundred thirty-four thousand, two hundred twenty-one".