51271400000 has 168 divisors, whose sum is σ = 127775649960. Its totient is φ = 20410880000.

The previous prime is 51271399979. The next prime is 51271400017. The reversal of 51271400000 is 417215.

It can be written as a sum of positive squares in 12 ways, for example, as 47702054464 + 3569345536 = 218408^2 + 59744^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 53799524 + ... + 53800476.

It is an arithmetic number, because the mean of its divisors is an integer number (760569345).

Almost surely, 2^51271400000 is an apocalyptic number.

51271400000 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 51271400000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63887824980).

51271400000 is an abundant number, since it is smaller than the sum of its proper divisors (76504249960).

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

51271400000 is an frugal number, since it uses more digits than its factorization.

51271400000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1259 (or 1229 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 20.

Adding to 51271400000 its reverse (417215), we get a palindrome (51271817215).

The spelling of 51271400000 in words is "fifty-one billion, two hundred seventy-one million, four hundred thousand".