51171185 has 16 divisors (see below), whose sum is σ = 67919376. Its totient is φ = 36764928.

The previous prime is 51171179. The next prime is 51171187. The reversal of 51171185 is 58117115.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 5053504 + 46117681 = 2248^2 + 6791^2 .

It is a cyclic number.

It is not a de Polignac number, because 51171185 - 2¹⁴ = 51154801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51171187) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8234 + ... + 13043.

It is an arithmetic number, because the mean of its divisors is an integer number (4244961).

Almost surely, 2^51171185 is an apocalyptic number.

It is an amenable number.

51171185 is a deficient number, since it is larger than the sum of its proper divisors (16748191).

51171185 is a wasteful number, since it uses less digits than its factorization.

51171185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21332.

The product of its digits is 1400, while the sum is 29.

The square root of 51171185 is about 7153.4037352857. The cubic root of 51171185 is about 371.2574335219.

The spelling of 51171185 in words is "fifty-one million, one hundred seventy-one thousand, one hundred eighty-five".