51255151000002 has 128 divisors (see below), whose sum is σ = 120346320568320. Its totient is φ = 16144377701760.

The previous prime is 51255150999931. The next prime is 51255151000003. The reversal of 51255151000002 is 20000015155215.

51255151000002 is a `hidden beast` number, since 5 + 1 + 2 + 551 + 5 + 100 + 0 + 0 + 0 + 2 = 666.

51255151000002 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 51255151000002.

It is not an unprimeable number, because it can be changed into a prime (51255151000003) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 234336063 + ... + 234554685.

It is an arithmetic number, because the mean of its divisors is an integer number (940205629440).

Almost surely, 2^{51255151000002} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51255151000002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60173160284160).

51255151000002 is an abundant number, since it is smaller than the sum of its proper divisors (69091169568318).

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

51255151000002 is a wasteful number, since it uses less digits than its factorization.

51255151000002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221965 (or 221959 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 27.

Adding to 51255151000002 its reverse (20000015155215), we get a palindrome (71255166155217).

The spelling of 51255151000002 in words is "fifty-one trillion, two hundred fifty-five billion, one hundred fifty-one million, two", and thus it is an aban number.