144221416 has 8 divisors (see below), whose sum is σ = 270415170. Its totient is φ = 72110704.

The previous prime is 144221401. The next prime is 144221423. The reversal of 144221416 is 614122441.

It can be written as a sum of positive squares in only one way, i.e., 98604900 + 45616516 = 9930^2 + 6754^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 9013831 + ... + 9013846.

Almost surely, 2^144221416 is an apocalyptic number.

It is an amenable number.

144221416 is a deficient number, since it is larger than the sum of its proper divisors (126193754).

144221416 is a wasteful number, since it uses less digits than its factorization.

144221416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18027683 (or 18027679 counting only the distinct ones).

The product of its digits is 1536, while the sum is 25.

The square root of 144221416 is about 12009.2221230186. Note that the first 3 decimals coincide. The cubic root of 144221416 is about 524.4167866744.

Adding to 144221416 its reverse (614122441), we get a palindrome (758343857).

The spelling of 144221416 in words is "one hundred forty-four million, two hundred twenty-one thousand, four hundred sixteen".