51875000 has 64 divisors (see below), whose sum is σ = 123046560. Its totient is φ = 20500000.

The previous prime is 51874967. The next prime is 51875003. The reversal of 51875000 is 57815.

51875000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51875003) 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 15 ways as a sum of consecutive naturals, for example, 624959 + ... + 625041.

Almost surely, 2^51875000 is an apocalyptic number.

51875000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51875000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61523280).

51875000 is an abundant number, since it is smaller than the sum of its proper divisors (71171560).

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

51875000 is an frugal number, since it uses more digits than its factorization.

51875000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124 (or 90 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 26.

The square root of 51875000 is about 7202.4301454440. The cubic root of 51875000 is about 372.9517962946.

The spelling of 51875000 in words is "fifty-one million, eight hundred seventy-five thousand".