51473816217 has 48 divisors (see below), whose sum is σ = 76826880000. Its totient is φ = 33193812960.

The previous prime is 51473816209. The next prime is 51473816257. The reversal of 51473816217 is 71261837415.

51473816217 is a `hidden beast` number, since 5 + 1 + 473 + 8 + 162 + 17 = 666.

51473816217 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51473816217 - 2³ = 51473816209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51473816257) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 25748784 + ... + 25750782.

It is an arithmetic number, because the mean of its divisors is an integer number (1600560000).

Almost surely, 2^51473816217 is an apocalyptic number.

It is an amenable number.

51473816217 is a deficient number, since it is larger than the sum of its proper divisors (25353063783).

51473816217 is a wasteful number, since it uses less digits than its factorization.

51473816217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2818 (or 2815 counting only the distinct ones).

The product of its digits is 282240, while the sum is 45.

The spelling of 51473816217 in words is "fifty-one billion, four hundred seventy-three million, eight hundred sixteen thousand, two hundred seventeen".