51312012200 has 48 divisors (see below), whose sum is σ = 123148844160. Its totient is φ = 19862712000.

The previous prime is 51312012179. The next prime is 51312012209. The reversal of 51312012200 is 221021315.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (51312012209) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4131866 + ... + 4144265.

It is an arithmetic number, because the mean of its divisors is an integer number (2565600920).

Almost surely, 2^51312012200 is an apocalyptic number.

51312012200 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51312012200 is an abundant number, since it is smaller than the sum of its proper divisors (71836831960).

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

51312012200 is a wasteful number, since it uses less digits than its factorization.

51312012200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8276178 (or 8276169 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

Adding to 51312012200 its reverse (221021315), we get a palindrome (51533033515).

The spelling of 51312012200 in words is "fifty-one billion, three hundred twelve million, twelve thousand, two hundred".