51718816 has 24 divisors (see below), whose sum is σ = 102199104. Its totient is φ = 25763520.

The previous prime is 51718813. The next prime is 51718837. The reversal of 51718816 is 61881715.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (51718813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6201 + ... + 11911.

It is an arithmetic number, because the mean of its divisors is an integer number (4258296).

Almost surely, 2^51718816 is an apocalyptic number.

It is an amenable number.

51718816 is a deficient number, since it is larger than the sum of its proper divisors (50480288).

51718816 is a wasteful number, since it uses less digits than its factorization.

51718816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6004 (or 5996 counting only the distinct ones).

The product of its digits is 13440, while the sum is 37.

The square root of 51718816 is about 7191.5795205226. The cubic root of 51718816 is about 372.5771286020.

The spelling of 51718816 in words is "fifty-one million, seven hundred eighteen thousand, eight hundred sixteen".