51378 has 8 divisors (see below), whose sum is σ = 102768. Its totient is φ = 17124.

The previous prime is 51361. The next prime is 51383. The reversal of 51378 is 87315.

It is a sphenic number, since it is the product of 3 distinct primes.

51378 is an admirable number.

It is a plaindrome in base 11.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4276 + ... + 4287.

It is an arithmetic number, because the mean of its divisors is an integer number (12846).

2⁵¹³⁷⁸ is an apocalyptic number.

51378 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51384).

51378 is a wasteful number, since it uses less digits than its factorization.

51378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8568.

The product of its digits is 840, while the sum is 24.

The square root of 51378 is about 226.6671568622. The cubic root of 51378 is about 37.1756922944.

Subtracting 51378 from its reverse (87315), we obtain a cube (35937 = 33³).

The spelling of 51378 in words is "fifty-one thousand, three hundred seventy-eight".