52171861 has 8 divisors (see below), whose sum is σ = 63132480. Its totient is φ = 42088128.

The previous prime is 52171849. The next prime is 52171879. The reversal of 52171861 is 16817125.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 52171861 - 2⁵ = 52171829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52174861) 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 7 ways as a sum of consecutive naturals, for example, 219091 + ... + 219328.

It is an arithmetic number, because the mean of its divisors is an integer number (7891560).

Almost surely, 2^52171861 is an apocalyptic number.

It is an amenable number.

52171861 is a deficient number, since it is larger than the sum of its proper divisors (10960619).

52171861 is a wasteful number, since it uses less digits than its factorization.

52171861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438443.

The product of its digits is 3360, while the sum is 31.

The square root of 52171861 is about 7223.0091374717. The cubic root of 52171861 is about 373.6618642080.

Adding to 52171861 its reverse (16817125), we get a palindrome (68988986).

The spelling of 52171861 in words is "fifty-two million, one hundred seventy-one thousand, eight hundred sixty-one".