51425501200 has 120 divisors (see below), whose sum is σ = 126350127360. Its totient is φ = 20105164800.

The previous prime is 51425501173. The next prime is 51425501273. The reversal of 51425501200 is 210552415.

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, 18967845 + ... + 18970555.

It is an arithmetic number, because the mean of its divisors is an integer number (1052917728).

Almost surely, 2^51425501200 is an apocalyptic number.

51425501200 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 51425501200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63175063680).

51425501200 is an abundant number, since it is smaller than the sum of its proper divisors (74924626160).

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

51425501200 is a wasteful number, since it uses less digits than its factorization.

51425501200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3785 (or 3774 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

The spelling of 51425501200 in words is "fifty-one billion, four hundred twenty-five million, five hundred one thousand, two hundred".