2145204513205 has 16 divisors (see below), whose sum is σ = 2918172942720. Its totient is φ = 1500774654528.

The previous prime is 2145204513191. The next prime is 2145204513241. The reversal of 2145204513205 is 5023154025412.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-2145204513205 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 868502617 + ... + 868505086.

It is an arithmetic number, because the mean of its divisors is an integer number (182385808920).

Almost surely, 2^{2145204513205} is an apocalyptic number.

It is an amenable number.

2145204513205 is a deficient number, since it is larger than the sum of its proper divisors (772968429515).

2145204513205 is a wasteful number, since it uses less digits than its factorization.

2145204513205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1737007740.

The product of its (nonzero) digits is 48000, while the sum is 34.

Adding to 2145204513205 its reverse (5023154025412), we get a palindrome (7168358538617).

The spelling of 2145204513205 in words is "two trillion, one hundred forty-five billion, two hundred four million, five hundred thirteen thousand, two hundred five".