144213220 has 24 divisors (see below), whose sum is σ = 316016064. Its totient is φ = 55177056.

The previous prime is 144213217. The next prime is 144213229. The reversal of 144213220 is 22312441.

It is not an unprimeable number, because it can be changed into a prime (144213229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156294 + ... + 157213.

It is an arithmetic number, because the mean of its divisors is an integer number (13167336).

Almost surely, 2^144213220 is an apocalyptic number.

144213220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

144213220 is an abundant number, since it is smaller than the sum of its proper divisors (171802844).

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

144213220 is a wasteful number, since it uses less digits than its factorization.

144213220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313539 (or 313537 counting only the distinct ones).

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

The square root of 144213220 is about 12008.8808804151. The cubic root of 144213220 is about 524.4068524091.

Adding to 144213220 its reverse (22312441), we get a palindrome (166525661).

The spelling of 144213220 in words is "one hundred forty-four million, two hundred thirteen thousand, two hundred twenty".