2081310005 has 4 divisors (see below), whose sum is σ = 2497572012. Its totient is φ = 1665048000.

The previous prime is 2081309987. The next prime is 2081310029. The reversal of 2081310005 is 5000131802.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1088934001 + 992376004 = 32999^2 + 31502^2 .

It is not a de Polignac number, because 2081310005 - 2²⁰ = 2080261429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 208130996 + ... + 208131005.

It is an arithmetic number, because the mean of its divisors is an integer number (624393003).

Almost surely, 2^2081310005 is an apocalyptic number.

It is an amenable number.

2081310005 is a deficient number, since it is larger than the sum of its proper divisors (416262007).

2081310005 is an equidigital number, since it uses as much as digits as its factorization.

2081310005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416262006.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 2081310005 is about 45621.3766232454. The cubic root of 2081310005 is about 1276.7687879083.

Adding to 2081310005 its reverse (5000131802), we get a palindrome (7081441807).

The spelling of 2081310005 in words is "two billion, eighty-one million, three hundred ten thousand, five".