201223144 has 16 divisors (see below), whose sum is σ = 386068320. Its totient is φ = 98271600.

The previous prime is 201223117. The next prime is 201223157. The reversal of 201223144 is 441322102.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 292132 + ... + 292819.

It is an arithmetic number, because the mean of its divisors is an integer number (24129270).

Almost surely, 2^201223144 is an apocalyptic number.

It is an amenable number.

201223144 is a deficient number, since it is larger than the sum of its proper divisors (184845176).

201223144 is a wasteful number, since it uses less digits than its factorization.

201223144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585000 (or 584996 counting only the distinct ones).

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

The square root of 201223144 is about 14185.3143779051. The cubic root of 201223144 is about 585.9932904682.

Adding to 201223144 its reverse (441322102), we get a palindrome (642545246).

The spelling of 201223144 in words is "two hundred one million, two hundred twenty-three thousand, one hundred forty-four".