52157212105 has 4 divisors (see below), whose sum is σ = 62588654532. Its totient is φ = 41725769680.

The previous prime is 52157212013. The next prime is 52157212123. The reversal of 52157212105 is 50121275125.

It is a happy number.

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 40411854729 + 11745357376 = 201027^2 + 108376^2 .

It is not a de Polignac number, because 52157212105 - 2¹³ = 52157203913 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 5215721206 + ... + 5215721215.

It is an arithmetic number, because the mean of its divisors is an integer number (15647163633).

Almost surely, 2^52157212105 is an apocalyptic number.

It is an amenable number.

52157212105 is a deficient number, since it is larger than the sum of its proper divisors (10431442427).

52157212105 is a wasteful number, since it uses less digits than its factorization.

52157212105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10431442426.

The product of its (nonzero) digits is 7000, while the sum is 31.

The spelling of 52157212105 in words is "fifty-two billion, one hundred fifty-seven million, two hundred twelve thousand, one hundred five".