51212244221216 has 96 divisors (see below), whose sum is σ = 114000415986240. Its totient is φ = 22480753591296.

The previous prime is 51212244221209. The next prime is 51212244221251. The reversal of 51212244221216 is 61212244221215.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30871166 + ... + 32487741.

It is an arithmetic number, because the mean of its divisors is an integer number (1187504333190).

Almost surely, 2^{51212244221216} is an apocalyptic number.

It is an amenable number.

51212244221216 is an abundant number, since it is smaller than the sum of its proper divisors (62788171765024).

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

51212244221216 is a wasteful number, since it uses less digits than its factorization.

51212244221216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63359026 (or 63359018 counting only the distinct ones).

The product of its digits is 30720, while the sum is 35.

Subtracting 51212244221216 from its reverse (61212244221215), we obtain a palindrome (9999999999999).

The spelling of 51212244221216 in words is "fifty-one trillion, two hundred twelve billion, two hundred forty-four million, two hundred twenty-one thousand, two hundred sixteen".