51783478 has 4 divisors (see below), whose sum is σ = 77675220. Its totient is φ = 25891738.

The previous prime is 51783463. The next prime is 51783497. The reversal of 51783478 is 87438715.

51783478 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 12945868 + ... + 12945871.

It is an arithmetic number, because the mean of its divisors is an integer number (19418805).

Almost surely, 2^51783478 is an apocalyptic number.

51783478 is a deficient number, since it is larger than the sum of its proper divisors (25891742).

51783478 is a wasteful number, since it uses less digits than its factorization.

51783478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25891741.

The product of its digits is 188160, while the sum is 43.

The square root of 51783478 is about 7196.0737906167. The cubic root of 51783478 is about 372.7323367761.

The spelling of 51783478 in words is "fifty-one million, seven hundred eighty-three thousand, four hundred seventy-eight".