51856378 has 16 divisors (see below), whose sum is σ = 89686080. Its totient is φ = 22026816.

The previous prime is 51856367. The next prime is 51856381. The reversal of 51856378 is 87365815.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14808 + ... + 17971.

It is an arithmetic number, because the mean of its divisors is an integer number (5605380).

Almost surely, 2^51856378 is an apocalyptic number.

51856378 is a deficient number, since it is larger than the sum of its proper divisors (37829702).

51856378 is a wasteful number, since it uses less digits than its factorization.

51856378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32901.

The product of its digits is 201600, while the sum is 43.

The square root of 51856378 is about 7201.1372712926. The cubic root of 51856378 is about 372.9071637512.

The spelling of 51856378 in words is "fifty-one million, eight hundred fifty-six thousand, three hundred seventy-eight".