51212004400 has 60 divisors (see below), whose sum is σ = 123076999800. Its totient is φ = 20478115840.

The previous prime is 51212004379. The next prime is 51212004451. The reversal of 51212004400 is 440021215.

51212004400 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1312371 + ... + 1350829.

It is an arithmetic number, because the mean of its divisors is an integer number (2051283330).

Almost surely, 2^51212004400 is an apocalyptic number.

51212004400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51212004400 is an abundant number, since it is smaller than the sum of its proper divisors (71864995400).

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

51212004400 is a wasteful number, since it uses less digits than its factorization.

51212004400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41806 (or 41795 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

Adding to 51212004400 its reverse (440021215), we get a palindrome (51652025615).

The spelling of 51212004400 in words is "fifty-one billion, two hundred twelve million, four thousand, four hundred".