51223232216 has 16 divisors (see below), whose sum is σ = 103431526800. Its totient is φ = 23641491744.

The previous prime is 51223232189. The next prime is 51223232233. The reversal of 51223232216 is 61223232215.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 246265436 + ... + 246265643.

It is an arithmetic number, because the mean of its divisors is an integer number (6464470425).

Almost surely, 2^51223232216 is an apocalyptic number.

It is an amenable number.

51223232216 is an abundant number, since it is smaller than the sum of its proper divisors (52208294584).

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

51223232216 is a wasteful number, since it uses less digits than its factorization.

51223232216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492531098 (or 492531094 counting only the distinct ones).

The product of its digits is 8640, while the sum is 29.

Subtracting 51223232216 from its reverse (61223232215), we obtain a palindrome (9999999999).

The spelling of 51223232216 in words is "fifty-one billion, two hundred twenty-three million, two hundred thirty-two thousand, two hundred sixteen".