521541653313 has 16 divisors (see below), whose sum is σ = 701923029696. Its totient is φ = 344427682560.

The previous prime is 521541653279. The next prime is 521541653333. The reversal of 521541653313 is 313356145125.

It is not a de Polignac number, because 521541653313 - 2²⁰ = 521540604737 is a prime.

It is a super-2 number, since 2×521541653313² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (521541653333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11160645 + ... + 11207277.

It is an arithmetic number, because the mean of its divisors is an integer number (43870189356).

Almost surely, 2^521541653313 is an apocalyptic number.

It is an amenable number.

521541653313 is a deficient number, since it is larger than the sum of its proper divisors (180381376383).

521541653313 is a wasteful number, since it uses less digits than its factorization.

521541653313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81584.

The product of its digits is 162000, while the sum is 39.

Adding to 521541653313 its reverse (313356145125), we get a palindrome (834897798438).

The spelling of 521541653313 in words is "five hundred twenty-one billion, five hundred forty-one million, six hundred fifty-three thousand, three hundred thirteen".