51804388 has 12 divisors (see below), whose sum is σ = 90886572. Its totient is φ = 25836800.

The previous prime is 51804359. The next prime is 51804391. The reversal of 51804388 is 88340815.

51804388 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 50808384 + 996004 = 7128^2 + 998^2 .

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 in 3 ways as a sum of consecutive naturals, for example, 14545 + ... + 17752.

It is an arithmetic number, because the mean of its divisors is an integer number (7573881).

Almost surely, 2^51804388 is an apocalyptic number.

It is an amenable number.

51804388 is a deficient number, since it is larger than the sum of its proper divisors (39082184).

51804388 is a wasteful number, since it uses less digits than its factorization.

51804388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32702 (or 32700 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 37.

The square root of 51804388 is about 7197.5265195760. The cubic root of 51804388 is about 372.7824993934.

The spelling of 51804388 in words is "fifty-one million, eight hundred four thousand, three hundred eighty-eight".