51086870 has 16 divisors (see below), whose sum is σ = 97365888. Its totient is φ = 19232640.

The previous prime is 51086857. The next prime is 51086873. The reversal of 51086870 is 7868015.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 51086870.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51086873) 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, 150086 + ... + 150425.

It is an arithmetic number, because the mean of its divisors is an integer number (6085368).

Almost surely, 2^51086870 is an apocalyptic number.

51086870 is a deficient number, since it is larger than the sum of its proper divisors (46279018).

51086870 is a wasteful number, since it uses less digits than its factorization.

51086870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300535.

The product of its (nonzero) digits is 13440, while the sum is 35.

The square root of 51086870 is about 7147.5079573233. The cubic root of 51086870 is about 371.0534138917.

The spelling of 51086870 in words is "fifty-one million, eighty-six thousand, eight hundred seventy".