2005143505 has 16 divisors (see below), whose sum is σ = 2482144704. Its totient is φ = 1554252480.

The previous prime is 2005143493. The next prime is 2005143533. The reversal of 2005143505 is 5053415002.

It is not a de Polignac number, because 2005143505 - 2¹⁹ = 2004619217 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2005143505.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28627 + ... + 69496.

It is an arithmetic number, because the mean of its divisors is an integer number (155134044).

Almost surely, 2^2005143505 is an apocalyptic number.

It is an amenable number.

2005143505 is a deficient number, since it is larger than the sum of its proper divisors (477001199).

2005143505 is an equidigital number, since it uses as much as digits as its factorization.

2005143505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98256.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 2005143505 is about 44778.8287586891. The cubic root of 2005143505 is about 1261.0001936959. Note that the first 3 decimals are identical.

Adding to 2005143505 its reverse (5053415002), we get a palindrome (7058558507).

The spelling of 2005143505 in words is "two billion, five million, one hundred forty-three thousand, five hundred five".