144216005 has 4 divisors (see below), whose sum is σ = 173059212. Its totient is φ = 115372800.

The previous prime is 144215977. The next prime is 144216019. The reversal of 144216005 is 500612441.

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

It can be written as a sum of positive squares in 2 ways, for example, as 77123524 + 67092481 = 8782^2 + 8191^2 .

It is not a de Polignac number, because 144216005 - 2⁶ = 144215941 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, 14421596 + ... + 14421605.

It is an arithmetic number, because the mean of its divisors is an integer number (43264803).

Almost surely, 2^144216005 is an apocalyptic number.

It is an amenable number.

144216005 is a deficient number, since it is larger than the sum of its proper divisors (28843207).

144216005 is an equidigital number, since it uses as much as digits as its factorization.

144216005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28843206.

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

The square root of 144216005 is about 12008.9968357061. The cubic root of 144216005 is about 524.4102281137.

Adding to 144216005 its reverse (500612441), we get a palindrome (644828446).

The spelling of 144216005 in words is "one hundred forty-four million, two hundred sixteen thousand, five".