52213440413521 has 4 divisors (see below), whose sum is σ = 52213740095344. Its totient is φ = 52213140731700.

The previous prime is 52213440413509. The next prime is 52213440413567. The reversal of 52213440413521 is 12531404431225.

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 52213440413521 - 2²³ = 52213432024913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52213140413521) 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, 149579415 + ... + 149928076.

It is an arithmetic number, because the mean of its divisors is an integer number (13053435023836).

Almost surely, 2^{52213440413521} is an apocalyptic number.

It is an amenable number.

52213440413521 is a deficient number, since it is larger than the sum of its proper divisors (299681823).

52213440413521 is a wasteful number, since it uses less digits than its factorization.

52213440413521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299681822.

The product of its (nonzero) digits is 115200, while the sum is 37.

Adding to 52213440413521 its reverse (12531404431225), we get a palindrome (64744844844746).

The spelling of 52213440413521 in words is "fifty-two trillion, two hundred thirteen billion, four hundred forty million, four hundred thirteen thousand, five hundred twenty-one".