51243025200 has 240 divisors, whose sum is σ = 174483403776. Its totient is φ = 12810752000.

The previous prime is 51243025189. The next prime is 51243025243. The reversal of 51243025200 is 252034215.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5360425 + ... + 5369975.

Almost surely, 2^51243025200 is an apocalyptic number.

51243025200 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 51243025200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87241701888).

51243025200 is an abundant number, since it is smaller than the sum of its proper divisors (123240378576).

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

51243025200 is a wasteful number, since it uses less digits than its factorization.

51243025200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9852 (or 9841 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

Adding to 51243025200 its reverse (252034215), we get a palindrome (51495059415).

The spelling of 51243025200 in words is "fifty-one billion, two hundred forty-three million, twenty-five thousand, two hundred".