144443521 has 4 divisors (see below), whose sum is σ = 146272000. Its totient is φ = 142615044.

The previous prime is 144443503. The next prime is 144443527. The reversal of 144443521 is 125344441.

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 a cyclic number.

It is not a de Polignac number, because 144443521 - 2⁷ = 144443393 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 144443521.

It is not an unprimeable number, because it can be changed into a prime (144443527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 914121 + ... + 914278.

It is an arithmetic number, because the mean of its divisors is an integer number (36568000).

Almost surely, 2^144443521 is an apocalyptic number.

It is an amenable number.

144443521 is a deficient number, since it is larger than the sum of its proper divisors (1828479).

144443521 is an equidigital number, since it uses as much as digits as its factorization.

144443521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1828478.

The product of its digits is 7680, while the sum is 28.

The square root of 144443521 is about 12018.4658338741. The cubic root of 144443521 is about 524.6858540867.

Adding to 144443521 its reverse (125344441), we get a palindrome (269787962).

The spelling of 144443521 in words is "one hundred forty-four million, four hundred forty-three thousand, five hundred twenty-one".