144537221 has 8 divisors (see below), whose sum is σ = 155687424. Its totient is φ = 133792560.

The previous prime is 144537203. The next prime is 144537223. The reversal of 144537221 is 122735441.

144537221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 144537221 - 2²⁶ = 77428357 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 (144537223) 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, 100646 + ... + 102071.

It is an arithmetic number, because the mean of its divisors is an integer number (19460928).

Almost surely, 2^144537221 is an apocalyptic number.

It is an amenable number.

144537221 is a deficient number, since it is larger than the sum of its proper divisors (11150203).

144537221 is a wasteful number, since it uses less digits than its factorization.

144537221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202771.

The product of its digits is 6720, while the sum is 29.

The square root of 144537221 is about 12022.3633699868. The cubic root of 144537221 is about 524.7992835143.

The spelling of 144537221 in words is "one hundred forty-four million, five hundred thirty-seven thousand, two hundred twenty-one".