2005312032145 has 4 divisors (see below), whose sum is σ = 2406374438580. Its totient is φ = 1604249625712.

The previous prime is 2005312032133. The next prime is 2005312032149. The reversal of 2005312032145 is 5412302135002.

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 971405388801 + 1033906643344 = 985599^2 + 1016812^2 .

It is a cyclic number.

It is not a de Polignac number, because 2005312032145 - 2¹⁵ = 2005311999377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2005312032149) 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, 200531203210 + ... + 200531203219.

It is an arithmetic number, because the mean of its divisors is an integer number (601593609645).

Almost surely, 2^{2005312032145} is an apocalyptic number.

It is an amenable number.

2005312032145 is a deficient number, since it is larger than the sum of its proper divisors (401062406435).

2005312032145 is an equidigital number, since it uses as much as digits as its factorization.

2005312032145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401062406434.

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 2005312032145 its reverse (5412302135002), we get a palindrome (7417614167147).

The spelling of 2005312032145 in words is "two trillion, five billion, three hundred twelve million, thirty-two thousand, one hundred forty-five".