51204540351000 has 128 divisors (see below), whose sum is σ = 159804518328000. Its totient is φ = 13650582348800.

The previous prime is 51204540350987. The next prime is 51204540351007. The reversal of 51204540351000 is 15304540215.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51204540351007) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7872634 + ... + 12821366.

Almost surely, 2^{51204540351000} is an apocalyptic number.

51204540351000 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 51204540351000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79902259164000).

51204540351000 is an abundant number, since it is smaller than the sum of its proper divisors (108599977977000).

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

51204540351000 is a wasteful number, since it uses less digits than its factorization.

51204540351000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4952206 (or 4952192 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

Adding to 51204540351000 its reverse (15304540215), we get a palindrome (51219844891215).

The spelling of 51204540351000 in words is "fifty-one trillion, two hundred four billion, five hundred forty million, three hundred fifty-one thousand".