52856220145 has 4 divisors (see below), whose sum is σ = 63427464180. Its totient is φ = 42284976112.

The previous prime is 52856220113. The next prime is 52856220199. The reversal of 52856220145 is 54102265825.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25451735296 + 27404484849 = 159536^2 + 165543^2 .

It is a cyclic number.

It is not a de Polignac number, because 52856220145 - 2⁵ = 52856220113 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 52856220098 and 52856220107.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5285622010 + ... + 5285622019.

It is an arithmetic number, because the mean of its divisors is an integer number (15856866045).

Almost surely, 2^52856220145 is an apocalyptic number.

It is an amenable number.

52856220145 is a deficient number, since it is larger than the sum of its proper divisors (10571244035).

52856220145 is a wasteful number, since it uses less digits than its factorization.

52856220145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10571244034.

The product of its (nonzero) digits is 192000, while the sum is 40.

The spelling of 52856220145 in words is "fifty-two billion, eight hundred fifty-six million, two hundred twenty thousand, one hundred forty-five".