51031216200 has 96 divisors (see below), whose sum is σ = 159442652160. Its totient is φ = 13501152000.

The previous prime is 51031216189. The next prime is 51031216207. The reversal of 51031216200 is 261213015.

It is a super-2 number, since 2×51031216200² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51031216207) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 258651 + ... + 411050.

It is an arithmetic number, because the mean of its divisors is an integer number (1660860960).

Almost surely, 2^51031216200 is an apocalyptic number.

51031216200 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51031216200 is an abundant number, since it is smaller than the sum of its proper divisors (108411435960).

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

51031216200 is a wasteful number, since it uses less digits than its factorization.

51031216200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669847 (or 669838 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

Adding to 51031216200 its reverse (261213015), we get a palindrome (51292429215).

The spelling of 51031216200 in words is "fifty-one billion, thirty-one million, two hundred sixteen thousand, two hundred".