2001223300 has 72 divisors (see below), whose sum is σ = 4503227400. Its totient is φ = 771025920.

The previous prime is 2001223297. The next prime is 2001223351. The reversal of 2001223300 is 33221002.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 596922624 + 1404300676 = 24432^2 + 37474^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2345674 + ... + 2346526.

It is an arithmetic number, because the mean of its divisors is an integer number (62544825).

Almost surely, 2^2001223300 is an apocalyptic number.

2001223300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2001223300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2251613700).

2001223300 is an abundant number, since it is smaller than the sum of its proper divisors (2502004100).

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

2001223300 is a wasteful number, since it uses less digits than its factorization.

2001223300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1705 (or 1698 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 2001223300 is about 44735.0343690491. The cubic root of 2001223300 is about 1260.1778744431.

Adding to 2001223300 its reverse (33221002), we get a palindrome (2034444302).

The spelling of 2001223300 in words is "two billion, one million, two hundred twenty-three thousand, three hundred".