2001002303 has 4 divisors (see below), whose sum is σ = 2004235560. Its totient is φ = 1997769048.

The previous prime is 2001002293. The next prime is 2001002317. The reversal of 2001002303 is 3032001002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2001002303 - 2⁶ = 2001002239 is a prime.

It is a super-3 number, since 3×2001002303³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001002383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1615700 + ... + 1616937.

It is an arithmetic number, because the mean of its divisors is an integer number (501058890).

Almost surely, 2^2001002303 is an apocalyptic number.

2001002303 is a deficient number, since it is larger than the sum of its proper divisors (3233257).

2001002303 is an equidigital number, since it uses as much as digits as its factorization.

2001002303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3233256.

The product of its (nonzero) digits is 36, while the sum is 11.

The square root of 2001002303 is about 44732.5642345708. The cubic root of 2001002303 is about 1260.1314851868.

Adding to 2001002303 its reverse (3032001002), we get a palindrome (5033003305).

It can be divided in two parts, 2001002 and 303, that multiplied together give a palindrome (606303606).

The spelling of 2001002303 in words is "two billion, one million, two thousand, three hundred three".