144415521 has 16 divisors (see below), whose sum is σ = 214302720. Its totient is φ = 96117840.

The previous prime is 144415519. The next prime is 144415549. The reversal of 144415521 is 125514441.

It is not a de Polignac number, because 144415521 - 2¹ = 144415519 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (144411521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13536 + ... + 21726.

It is an arithmetic number, because the mean of its divisors is an integer number (13393920).

Almost surely, 2^144415521 is an apocalyptic number.

It is an amenable number.

144415521 is a deficient number, since it is larger than the sum of its proper divisors (69887199).

144415521 is an equidigital number, since it uses as much as digits as its factorization.

144415521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8853 (or 8847 counting only the distinct ones).

The product of its digits is 3200, while the sum is 27.

The square root of 144415521 is about 12017.3009032811. The cubic root of 144415521 is about 524.6519489008.

Adding to 144415521 its reverse (125514441), we get a palindrome (269929962).

The spelling of 144415521 in words is "one hundred forty-four million, four hundred fifteen thousand, five hundred twenty-one".