52171851 has 4 divisors (see below), whose sum is σ = 69562472. Its totient is φ = 34781232.

The previous prime is 52171849. The next prime is 52171879. The reversal of 52171851 is 15817125.

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

It is not a de Polignac number, because 52171851 - 2¹ = 52171849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52171051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8695306 + ... + 8695311.

It is an arithmetic number, because the mean of its divisors is an integer number (17390618).

Almost surely, 2^52171851 is an apocalyptic number.

52171851 is a deficient number, since it is larger than the sum of its proper divisors (17390621).

52171851 is a wasteful number, since it uses less digits than its factorization.

52171851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17390620.

The product of its digits is 2800, while the sum is 30.

The square root of 52171851 is about 7223.0084452394. The cubic root of 52171851 is about 373.6618403342.

Adding to 52171851 its reverse (15817125), we get a palindrome (67988976).

The spelling of 52171851 in words is "fifty-two million, one hundred seventy-one thousand, eight hundred fifty-one".