2001133273 has 2 divisors, whose sum is σ = 2001133274. Its totient is φ = 2001133272.

The previous prime is 2001133249. The next prime is 2001133339. The reversal of 2001133273 is 3723311002.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1711725129 + 289408144 = 41373^2 + 17012^2 .

It is a cyclic number.

It is not a de Polignac number, because 2001133273 - 2⁹ = 2001132761 is a prime.

It is not a weakly prime, because it can be changed into another prime (2001133873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000566636 + 1000566637.

It is an arithmetic number, because the mean of its divisors is an integer number (1000566637).

Almost surely, 2^2001133273 is an apocalyptic number.

It is an amenable number.

2001133273 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001133273 is an equidigital number, since it uses as much as digits as its factorization.

2001133273 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 22.

The square root of 2001133273 is about 44734.0281329549. The cubic root of 2001133273 is about 1260.1589773791.

Adding to 2001133273 its reverse (3723311002), we get a palindrome (5724444275).

The spelling of 2001133273 in words is "two billion, one million, one hundred thirty-three thousand, two hundred seventy-three".