2001320031 has 8 divisors (see below), whose sum is σ = 2684798080. Its totient is φ = 1326027672.

The previous prime is 2001320021. The next prime is 2001320033. The reversal of 2001320031 is 1300231002.

It is a happy number.

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

It is not a de Polignac number, because 2001320031 - 2¹⁰ = 2001319007 is a prime.

It is a super-2 number, since 2×2001320031² = 8010563732963681922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2001319989 and 2001320016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001320033) 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, 2045851 + ... + 2046828.

It is an arithmetic number, because the mean of its divisors is an integer number (335599760).

Almost surely, 2^2001320031 is an apocalyptic number.

2001320031 is a deficient number, since it is larger than the sum of its proper divisors (683478049).

2001320031 is a wasteful number, since it uses less digits than its factorization.

2001320031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4092845.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 2001320031 is about 44736.1155108487. The cubic root of 2001320031 is about 1260.1981780748.

Adding to 2001320031 its reverse (1300231002), we get a palindrome (3301551033).

It can be divided in two parts, 200 and 1320031, that added together give a palindrome (1320231).

The spelling of 2001320031 in words is "two billion, one million, three hundred twenty thousand, thirty-one".