51087006 has 48 divisors (see below), whose sum is σ = 118857024. Its totient is φ = 15800832.

The previous prime is 51086947. The next prime is 51087007. The reversal of 51087006 is 60078015.

51087006 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51087007) 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 23 ways as a sum of consecutive naturals, for example, 21195 + ... + 23481.

It is an arithmetic number, because the mean of its divisors is an integer number (2476188).

Almost surely, 2^51087006 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51087006, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59428512).

51087006 is an abundant number, since it is smaller than the sum of its proper divisors (67770018).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51087006 is a wasteful number, since it uses less digits than its factorization.

51087006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2385 (or 2382 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 51087006 is about 7147.5174711224. The cubic root of 51087006 is about 371.0537431558.

The spelling of 51087006 in words is "fifty-one million, eighty-seven thousand, six".