144220251 has 16 divisors (see below), whose sum is σ = 221224448. Its totient is φ = 81864000.

The previous prime is 144220207. The next prime is 144220273. The reversal of 144220251 is 152022441.

It is not a de Polignac number, because 144220251 - 2⁷ = 144220123 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144220201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19570 + ... + 25911.

It is an arithmetic number, because the mean of its divisors is an integer number (13826528).

Almost surely, 2^144220251 is an apocalyptic number.

144220251 is a deficient number, since it is larger than the sum of its proper divisors (77004197).

144220251 is a wasteful number, since it uses less digits than its factorization.

144220251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45642.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 144220251 is about 12009.1736185301. The cubic root of 144220251 is about 524.4153746159.

Adding to 144220251 its reverse (152022441), we get a palindrome (296242692).

The spelling of 144220251 in words is "one hundred forty-four million, two hundred twenty thousand, two hundred fifty-one".