51172171 has 8 divisors (see below), whose sum is σ = 54074880. Its totient is φ = 48325992.

The previous prime is 51172133. The next prime is 51172249. The reversal of 51172171 is 17127115.

51172171 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 51172171 - 2²⁵ = 17617739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51172271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12265 + ... + 15898.

It is an arithmetic number, because the mean of its divisors is an integer number (6759360).

Almost surely, 2^51172171 is an apocalyptic number.

51172171 is a deficient number, since it is larger than the sum of its proper divisors (2902709).

51172171 is a wasteful number, since it uses less digits than its factorization.

51172171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28265.

The product of its digits is 490, while the sum is 25.

The square root of 51172171 is about 7153.4726531944. The cubic root of 51172171 is about 371.2598180507.

Adding to 51172171 its reverse (17127115), we get a palindrome (68299286).

The spelling of 51172171 in words is "fifty-one million, one hundred seventy-two thousand, one hundred seventy-one".