5205440521013 has 12 divisors (see below), whose sum is σ = 5679104951172. Its totient is φ = 4766826286080.

The previous prime is 5205440520997. The next prime is 5205440521063. The reversal of 5205440521013 is 3101250445025.

It can be written as a sum of positive squares in 6 ways, for example, as 2452738118884 + 2752702402129 = 1566122^2 + 1659127^2 .

It is not a de Polignac number, because 5205440521013 - 2⁴ = 5205440520997 is a prime.

It is a super-2 number, since 2×5205440521013² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5205440521063) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 243393428 + ... + 243414813.

It is an arithmetic number, because the mean of its divisors is an integer number (473258745931).

Almost surely, 2^{5205440521013} is an apocalyptic number.

It is an amenable number.

5205440521013 is a deficient number, since it is larger than the sum of its proper divisors (473664430159).

5205440521013 is a wasteful number, since it uses less digits than its factorization.

5205440521013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486808312 (or 486808295 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 32.

Adding to 5205440521013 its reverse (3101250445025), we get a palindrome (8306690966038).

The spelling of 5205440521013 in words is "five trillion, two hundred five billion, four hundred forty million, five hundred twenty-one thousand, thirteen".