51320450200 has 48 divisors (see below), whose sum is σ = 119540853360. Its totient is φ = 20490192000.

The previous prime is 51320450189. The next prime is 51320450309. The reversal of 51320450200 is 205402315.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 128956 + ... + 345355.

It is an arithmetic number, because the mean of its divisors is an integer number (2490434445).

Almost surely, 2^51320450200 is an apocalyptic number.

51320450200 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51320450200 is an abundant number, since it is smaller than the sum of its proper divisors (68220403160).

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

51320450200 is a wasteful number, since it uses less digits than its factorization.

51320450200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474868 (or 474859 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

Adding to 51320450200 its reverse (205402315), we get a palindrome (51525852515).

The spelling of 51320450200 in words is "fifty-one billion, three hundred twenty million, four hundred fifty thousand, two hundred".