51087872 has 80 divisors (see below), whose sum is σ = 114314112. Its totient is φ = 22609920.

The previous prime is 51087859. The next prime is 51087887. The reversal of 51087872 is 27878015.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 264608 + ... + 264800.

Almost surely, 2^51087872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51087872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57157056).

51087872 is an abundant number, since it is smaller than the sum of its proper divisors (63226240).

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

51087872 is a wasteful number, since it uses less digits than its factorization.

51087872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269 (or 253 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 38.

The square root of 51087872 is about 7147.5780513402. The cubic root of 51087872 is about 371.0558397798.

The spelling of 51087872 in words is "fifty-one million, eighty-seven thousand, eight hundred seventy-two".