144531221 has 8 divisors (see below), whose sum is σ = 146836800. Its totient is φ = 142233280.

The previous prime is 144531209. The next prime is 144531239. The reversal of 144531221 is 122135441.

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 144531221 - 2²⁶ = 77422357 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144531281) 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, 45245 + ... + 48333.

It is an arithmetic number, because the mean of its divisors is an integer number (18354600).

Almost surely, 2^144531221 is an apocalyptic number.

It is an amenable number.

144531221 is a deficient number, since it is larger than the sum of its proper divisors (2305579).

144531221 is an equidigital number, since it uses as much as digits as its factorization.

144531221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3819.

The product of its digits is 960, while the sum is 23.

The square root of 144531221 is about 12022.1138324340. The cubic root of 144531221 is about 524.7920216264.

Adding to 144531221 its reverse (122135441), we get a palindrome (266666662).

The spelling of 144531221 in words is "one hundred forty-four million, five hundred thirty-one thousand, two hundred twenty-one".