51173816 has 16 divisors (see below), whose sum is σ = 97108200. Its totient is φ = 25278304.

The previous prime is 51173809. The next prime is 51173819. The reversal of 51173816 is 61837115.

51173816 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51173819) by changing a digit.

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, 37871 + ... + 39198.

Almost surely, 2^51173816 is an apocalyptic number.

It is an amenable number.

51173816 is a deficient number, since it is larger than the sum of its proper divisors (45934384).

51173816 is a wasteful number, since it uses less digits than its factorization.

51173816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77158 (or 77154 counting only the distinct ones).

The product of its digits is 5040, while the sum is 32.

The square root of 51173816 is about 7153.5876313917. The cubic root of 51173816 is about 371.2637962276.

The spelling of 51173816 in words is "fifty-one million, one hundred seventy-three thousand, eight hundred sixteen".