2001133205 has 8 divisors (see below), whose sum is σ = 2402431800. Its totient is φ = 1600191936.

The previous prime is 2001133201. The next prime is 2001133231. The reversal of 2001133205 is 5023311002.

It can be written as a sum of positive squares in 4 ways, for example, as 182196004 + 1818937201 = 13498^2 + 42649^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2001133205 - 2² = 2001133201 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001133201) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 76850 + ... + 99539.

It is an arithmetic number, because the mean of its divisors is an integer number (300303975).

Almost surely, 2^2001133205 is an apocalyptic number.

It is an amenable number.

2001133205 is a deficient number, since it is larger than the sum of its proper divisors (401298595).

2001133205 is a wasteful number, since it uses less digits than its factorization.

2001133205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178663.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 2001133205 is about 44734.0273729071. The cubic root of 2001133205 is about 1260.1589631053.

Adding to 2001133205 its reverse (5023311002), we get a palindrome (7024444207).

The spelling of 2001133205 in words is "two billion, one million, one hundred thirty-three thousand, two hundred five".