51855171 has 8 divisors (see below), whose sum is σ = 69668544. Its totient is φ = 34305960.

The previous prime is 51855143. The next prime is 51855173. The reversal of 51855171 is 17155815.

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

It is not a de Polignac number, because 51855171 - 2⁶ = 51855107 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (51855173) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65581 + ... + 66366.

It is an arithmetic number, because the mean of its divisors is an integer number (8708568).

Almost surely, 2^51855171 is an apocalyptic number.

51855171 is a deficient number, since it is larger than the sum of its proper divisors (17813373).

51855171 is a wasteful number, since it uses less digits than its factorization.

51855171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132081.

The product of its digits is 7000, while the sum is 33.

The square root of 51855171 is about 7201.0534645981. The cubic root of 51855171 is about 372.9042704881.

The spelling of 51855171 in words is "fifty-one million, eight hundred fifty-five thousand, one hundred seventy-one".