51087740 has 24 divisors (see below), whose sum is σ = 117037872. Its totient is φ = 18577280.

The previous prime is 51087733. The next prime is 51087791. The reversal of 51087740 is 4778015.

51087740 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 51087697 and 51087706.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 115889 + ... + 116328.

It is an arithmetic number, because the mean of its divisors is an integer number (4876578).

Almost surely, 2^51087740 is an apocalyptic number.

It is an amenable number.

51087740 is an abundant number, since it is smaller than the sum of its proper divisors (65950132).

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

51087740 is a wasteful number, since it uses less digits than its factorization.

51087740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232237 (or 232235 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 32.

The square root of 51087740 is about 7147.5688174372. The cubic root of 51087740 is about 371.0555202036.

The spelling of 51087740 in words is "fifty-one million, eighty-seven thousand, seven hundred forty".