51255151000000 has 196 divisors, whose sum is σ = 131519218876200. Its totient is φ = 19795081600000.

The previous prime is 51255150999931. The next prime is 51255151000003. The reversal of 51255151000000 is 15155215.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

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

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 28116291 + ... + 29883709.

Almost surely, 2^{51255151000000} is an apocalyptic number.

51255151000000 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 51255151000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65759609438100).

51255151000000 is an abundant number, since it is smaller than the sum of its proper divisors (80264067876200).

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

51255151000000 is an frugal number, since it uses more digits than its factorization.

51255151000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1767490 (or 1767455 counting only the distinct ones).

The product of its (nonzero) digits is 1250, while the sum is 25.

Adding to 51255151000000 its reverse (15155215), we get a palindrome (51255166155215).

The spelling of 51255151000000 in words is "fifty-one trillion, two hundred fifty-five billion, one hundred fifty-one million", and thus it is an aban number.