144321220 has 12 divisors (see below), whose sum is σ = 303074604. Its totient is φ = 57728480.

The previous prime is 144321217. The next prime is 144321239. The reversal of 144321220 is 22123441.

It can be written as a sum of positive squares in 2 ways, for example, as 23892544 + 120428676 = 4888^2 + 10974^2 .

It is a super-2 number, since 2×144321220² = 41657229084576800, which contains 22 as substring.

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 in 3 ways as a sum of consecutive naturals, for example, 3608011 + ... + 3608050.

It is an arithmetic number, because the mean of its divisors is an integer number (25256217).

Almost surely, 2^144321220 is an apocalyptic number.

144321220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

144321220 is an abundant number, since it is smaller than the sum of its proper divisors (158753384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

144321220 is a wasteful number, since it uses less digits than its factorization.

144321220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7216070 (or 7216068 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 144321220 is about 12013.3767109835. The cubic root of 144321220 is about 524.5377276226.

Adding to 144321220 its reverse (22123441), we get a palindrome (166444661).

It can be divided in two parts, 14 and 4321220, that added together give a palindrome (4321234).

The spelling of 144321220 in words is "one hundred forty-four million, three hundred twenty-one thousand, two hundred twenty".