2001224144 has 20 divisors (see below), whose sum is σ = 3905270880. Its totient is φ = 993412320.

The previous prime is 2001224131. The next prime is 2001224149. The reversal of 2001224144 is 4414221002.

It is a super-3 number, since 3×2001224144³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001224149) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 447692 + ... + 452139.

It is an arithmetic number, because the mean of its divisors is an integer number (195263544).

Almost surely, 2^2001224144 is an apocalyptic number.

It is an amenable number.

2001224144 is a deficient number, since it is larger than the sum of its proper divisors (1904046736).

2001224144 is a wasteful number, since it uses less digits than its factorization.

2001224144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 899978 (or 899972 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 2001224144 is about 44735.0438023704. The cubic root of 2001224144 is about 1260.1780515998.

Adding to 2001224144 its reverse (4414221002), we get a palindrome (6415445146).

The spelling of 2001224144 in words is "two billion, one million, two hundred twenty-four thousand, one hundred forty-four".