51390070200 has 576 divisors, whose sum is σ = 205201152000. Its totient is φ = 11278310400.

The previous prime is 51390070189. The next prime is 51390070213. The reversal of 51390070200 is 207009315.

51390070200 is a `hidden beast` number, since 5 + 1 + 390 + 0 + 70 + 200 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 58198959 + ... + 58199841.

It is an arithmetic number, because the mean of its divisors is an integer number (356252000).

Almost surely, 2^51390070200 is an apocalyptic number.

51390070200 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51390070200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102600576000).

51390070200 is an abundant number, since it is smaller than the sum of its proper divisors (153811081800).

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

51390070200 is a wasteful number, since it uses less digits than its factorization.

51390070200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1092 (or 1080 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 27.

Adding to 51390070200 its reverse (207009315), we get a palindrome (51597079515).

The spelling of 51390070200 in words is "fifty-one billion, three hundred ninety million, seventy thousand, two hundred".