51510123400000 has 336 divisors, whose sum is σ = 130226025594672. Its totient is φ = 20210319360000.

The previous prime is 51510123399937. The next prime is 51510123400091. The reversal of 51510123400000 is 432101515.

It is a happy number.

It can be written as a sum of positive squares in 24 ways, for example, as 37402226821696 + 14107896578304 = 6115736^2 + 3756048^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2192188252 + ... + 2192211748.

It is an arithmetic number, because the mean of its divisors is an integer number (387577457127).

Almost surely, 2^{51510123400000} is an apocalyptic number.

51510123400000 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 51510123400000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65113012797336).

51510123400000 is an abundant number, since it is smaller than the sum of its proper divisors (78715902194672).

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

51510123400000 is an equidigital number, since it uses as much as digits as its factorization.

51510123400000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23744 (or 23714 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

Adding to 51510123400000 its reverse (432101515), we get a palindrome (51510555501515).

The spelling of 51510123400000 in words is "fifty-one trillion, five hundred ten billion, one hundred twenty-three million, four hundred thousand".