51819750 has 96 divisors (see below), whose sum is σ = 145480608. Its totient is φ = 13802400.

The previous prime is 51819749. The next prime is 51819797. The reversal of 51819750 is 5791815.

51819750 is a `hidden beast` number, since 518 + 1 + 97 + 50 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 60324 + ... + 61176.

It is an arithmetic number, because the mean of its divisors is an integer number (1515423).

Almost surely, 2^51819750 is an apocalyptic number.

51819750 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 51819750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72740304).

51819750 is an abundant number, since it is smaller than the sum of its proper divisors (93660858).

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

51819750 is an equidigital number, since it uses as much as digits as its factorization.

51819750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 885 (or 863 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 36.

The square root of 51819750 is about 7198.5936126441. The cubic root of 51819750 is about 372.8193438835.

The spelling of 51819750 in words is "fifty-one million, eight hundred nineteen thousand, seven hundred fifty".