52567251521 has 4 divisors (see below), whose sum is σ = 54262969344. Its totient is φ = 50871533700.

The previous prime is 52567251509. The next prime is 52567251577. The reversal of 52567251521 is 12515276525.

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 52567251521 - 2¹⁰ = 52567250497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52567251221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 847858865 + ... + 847858926.

It is an arithmetic number, because the mean of its divisors is an integer number (13565742336).

Almost surely, 2^52567251521 is an apocalyptic number.

It is an amenable number.

52567251521 is a deficient number, since it is larger than the sum of its proper divisors (1695717823).

52567251521 is a wasteful number, since it uses less digits than its factorization.

52567251521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1695717822.

The product of its digits is 210000, while the sum is 41.

The spelling of 52567251521 in words is "fifty-two billion, five hundred sixty-seven million, two hundred fifty-one thousand, five hundred twenty-one".