51087510 has 80 divisors (see below), whose sum is σ = 139827600. Its totient is φ = 13379904.

The previous prime is 51087497. The next prime is 51087527. The reversal of 51087510 is 1578015.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

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 39 ways as a sum of consecutive naturals, for example, 47256 + ... + 48324.

It is an arithmetic number, because the mean of its divisors is an integer number (1747845).

Almost surely, 2^51087510 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51087510, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69913800).

51087510 is an abundant number, since it is smaller than the sum of its proper divisors (88740090).

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

51087510 is a wasteful number, since it uses less digits than its factorization.

51087510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1147 (or 1138 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 27.

The square root of 51087510 is about 7147.5527280322. The cubic root of 51087510 is about 371.0549633648.

The spelling of 51087510 in words is "fifty-one million, eighty-seven thousand, five hundred ten".