51025505200 has 120 divisors (see below), whose sum is σ = 123630036080. Its totient is φ = 20237644800.

The previous prime is 51025505171. The next prime is 51025505239. The reversal of 51025505200 is 250552015.

It is a happy number.

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

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, 25372195 + ... + 25374205.

Almost surely, 2^51025505200 is an apocalyptic number.

51025505200 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 51025505200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61815018040).

51025505200 is an abundant number, since it is smaller than the sum of its proper divisors (72604530880).

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

51025505200 is a wasteful number, since it uses less digits than its factorization.

51025505200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2535 (or 2524 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 25.

The spelling of 51025505200 in words is "fifty-one billion, twenty-five million, five hundred five thousand, two hundred".