2521240104205 has 4 divisors (see below), whose sum is σ = 3025488125052. Its totient is φ = 2016992083360.

The previous prime is 2521240104161. The next prime is 2521240104217. The reversal of 2521240104205 is 5024010421252.

It is a happy number.

2521240104205 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 363390746761 + 2157849357444 = 602819^2 + 1468962^2 .

It is a de Polignac number, because none of the positive numbers 2^k-2521240104205 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, 252124010416 + ... + 252124010425.

It is an arithmetic number, because the mean of its divisors is an integer number (756372031263).

Almost surely, 2^{2521240104205} is an apocalyptic number.

It is an amenable number.

2521240104205 is a deficient number, since it is larger than the sum of its proper divisors (504248020847).

2521240104205 is an equidigital number, since it uses as much as digits as its factorization.

2521240104205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504248020846.

The product of its (nonzero) digits is 6400, while the sum is 28.

Adding to 2521240104205 its reverse (5024010421252), we get a palindrome (7545250525457).

The spelling of 2521240104205 in words is "two trillion, five hundred twenty-one billion, two hundred forty million, one hundred four thousand, two hundred five".