52513279521 has 4 divisors (see below), whose sum is σ = 70017706032. Its totient is φ = 35008853012.

The previous prime is 52513279519. The next prime is 52513279549. The reversal of 52513279521 is 12597231525.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 52513279521 - 2¹ = 52513279519 is a prime.

It is not an unprimeable number, because it can be changed into a prime (52513279501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8752213251 + ... + 8752213256.

It is an arithmetic number, because the mean of its divisors is an integer number (17504426508).

Almost surely, 2^52513279521 is an apocalyptic number.

It is an amenable number.

52513279521 is a deficient number, since it is larger than the sum of its proper divisors (17504426511).

52513279521 is a wasteful number, since it uses less digits than its factorization.

52513279521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17504426510.

The product of its digits is 189000, while the sum is 42.

The spelling of 52513279521 in words is "fifty-two billion, five hundred thirteen million, two hundred seventy-nine thousand, five hundred twenty-one".