51816873 has 8 divisors (see below), whose sum is σ = 69379200. Its totient is φ = 34399568.

The previous prime is 51816871. The next prime is 51816883. The reversal of 51816873 is 37861815.

51816873 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 51816873 - 2¹ = 51816871 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51816871) 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 7 ways as a sum of consecutive naturals, for example, 35418 + ... + 36851.

It is an arithmetic number, because the mean of its divisors is an integer number (8672400).

Almost surely, 2^51816873 is an apocalyptic number.

It is an amenable number.

51816873 is a deficient number, since it is larger than the sum of its proper divisors (17562327).

51816873 is a wasteful number, since it uses less digits than its factorization.

51816873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72511.

The product of its digits is 40320, while the sum is 39.

The square root of 51816873 is about 7198.3937791705. The cubic root of 51816873 is about 372.8124441905.

It can be divided in two parts, 518 and 16873, that added together give a triangular number (17391 = T₁₈₆).

The spelling of 51816873 in words is "fifty-one million, eight hundred sixteen thousand, eight hundred seventy-three".