51808075 has 24 divisors (see below), whose sum is σ = 73138176. Its totient is φ = 36036000.

The previous prime is 51808069. The next prime is 51808091. The reversal of 51808075 is 57080815.

51808075 = T₂₁₁₁ + T₂₁₁₂ + ... + T₂₁₃₃.

51808075 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51808075 - 2³ = 51808067 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51808075.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 2230 + ... + 10420.

It is an arithmetic number, because the mean of its divisors is an integer number (3047424).

Almost surely, 2^51808075 is an apocalyptic number.

51808075 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51808075 is a deficient number, since it is larger than the sum of its proper divisors (21330101).

51808075 is a wasteful number, since it uses less digits than its factorization.

51808075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8235 (or 8230 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 34.

The square root of 51808075 is about 7197.7826446761. The cubic root of 51808075 is about 372.7913430230.

The spelling of 51808075 in words is "fifty-one million, eight hundred eight thousand, seventy-five".