144221015 has 4 divisors (see below), whose sum is σ = 173065224. Its totient is φ = 115376808.

The previous prime is 144220997. The next prime is 144221027. The reversal of 144221015 is 510122441.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 144221015 - 2⁸ = 144220759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 14422097 + ... + 14422106.

It is an arithmetic number, because the mean of its divisors is an integer number (43266306).

Almost surely, 2^144221015 is an apocalyptic number.

144221015 is a deficient number, since it is larger than the sum of its proper divisors (28844209).

144221015 is an equidigital number, since it uses as much as digits as its factorization.

144221015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28844208.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 144221015 is about 12009.2054275044. The cubic root of 144221015 is about 524.4163006362.

Adding to 144221015 its reverse (510122441), we get a palindrome (654343456).

The spelling of 144221015 in words is "one hundred forty-four million, two hundred twenty-one thousand, fifteen".