2001400033 has 4 divisors (see below), whose sum is σ = 2001500820. Its totient is φ = 2001299248.

The previous prime is 2001400007. The next prime is 2001400061. The reversal of 2001400033 is 3300041002.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3300041002 = 2 ⋅1650020501.

It can be written as a sum of positive squares in 2 ways, for example, as 1397862544 + 603537489 = 37388^2 + 24567^2 .

It is a cyclic number.

It is not a de Polignac number, because 2001400033 - 2⁵ = 2001400001 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2001399986 and 2001400022.

It is not an unprimeable number, because it can be changed into a prime (2001400003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9598 + ... + 63991.

It is an arithmetic number, because the mean of its divisors is an integer number (500375205).

Almost surely, 2^2001400033 is an apocalyptic number.

It is an amenable number.

2001400033 is a deficient number, since it is larger than the sum of its proper divisors (100787).

2001400033 is an equidigital number, since it uses as much as digits as its factorization.

2001400033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100786.

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

The square root of 2001400033 is about 44737.0096564355. The cubic root of 2001400033 is about 1260.2149698305.

Adding to 2001400033 its reverse (3300041002), we get a palindrome (5301441035).

The spelling of 2001400033 in words is "two billion, one million, four hundred thousand, thirty-three".