51215718286216 has 32 divisors (see below), whose sum is σ = 104792990309280. Its totient is φ = 23272412716800.

The previous prime is 51215718286207. The next prime is 51215718286217. The reversal of 51215718286216 is 61268281751215.

It is not an unprimeable number, because it can be changed into a prime (51215718286217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92964186 + ... + 93513481.

It is an arithmetic number, because the mean of its divisors is an integer number (3274780947165).

Almost surely, 2^{51215718286216} is an apocalyptic number.

It is an amenable number.

51215718286216 is an abundant number, since it is smaller than the sum of its proper divisors (53577272023064).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51215718286216 is a wasteful number, since it uses less digits than its factorization.

51215718286216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186480805 (or 186480801 counting only the distinct ones).

The product of its digits is 3225600, while the sum is 55.

The spelling of 51215718286216 in words is "fifty-one trillion, two hundred fifteen billion, seven hundred eighteen million, two hundred eighty-six thousand, two hundred sixteen".