51254500000 has 168 divisors, whose sum is σ = 137613863520. Its totient is φ = 18636000000.

The previous prime is 51254499971. The next prime is 51254500021. The reversal of 51254500000 is 545215.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 5495341 + ... + 5504659.

It is an arithmetic number, because the mean of its divisors is an integer number (819130140).

Almost surely, 2^51254500000 is an apocalyptic number.

51254500000 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 51254500000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68806931760).

51254500000 is an abundant number, since it is smaller than the sum of its proper divisors (86359363520).

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

51254500000 is an frugal number, since it uses more digits than its factorization.

51254500000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9370 (or 9337 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 22.

The spelling of 51254500000 in words is "fifty-one billion, two hundred fifty-four million, five hundred thousand".