144221145 has 32 divisors (see below), whose sum is σ = 243302400. Its totient is φ = 72841920.

The previous prime is 144221131. The next prime is 144221167. The reversal of 144221145 is 541122441.

It is not a de Polignac number, because 144221145 - 2⁸ = 144220889 is a prime.

It is a super-2 number, since 2×144221145² = 41599477330222050, which contains 22 as substring.

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 31 ways as a sum of consecutive naturals, for example, 18556 + ... + 25154.

It is an arithmetic number, because the mean of its divisors is an integer number (7603200).

Almost surely, 2^144221145 is an apocalyptic number.

144221145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

144221145 is a deficient number, since it is larger than the sum of its proper divisors (99081255).

144221145 is a wasteful number, since it uses less digits than its factorization.

144221145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6685.

The product of its digits is 1280, while the sum is 24.

The square root of 144221145 is about 12009.2108400178. The cubic root of 144221145 is about 524.4164582048.

Adding to 144221145 its reverse (541122441), we get a palindrome (685343586).

The spelling of 144221145 in words is "one hundred forty-four million, two hundred twenty-one thousand, one hundred forty-five".