51288750 has 120 divisors (see below), whose sum is σ = 143279136. Its totient is φ = 13248000.

The previous prime is 51288707. The next prime is 51288761. The reversal of 51288750 is 5788215.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 528702 + ... + 528798.

Almost surely, 2^51288750 is an apocalyptic number.

51288750 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 51288750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71639568).

51288750 is an abundant number, since it is smaller than the sum of its proper divisors (91990386).

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

51288750 is a wasteful number, since it uses less digits than its factorization.

51288750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172 (or 154 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 36.

The square root of 51288750 is about 7161.6164376487. The cubic root of 51288750 is about 371.5415354487.

The spelling of 51288750 in words is "fifty-one million, two hundred eighty-eight thousand, seven hundred fifty".