51300000 has 288 divisors, whose sum is σ = 196862400. Its totient is φ = 12960000.

The previous prime is 51299977. The next prime is 51300001. The reversal of 51300000 is 315.

It is a tau number, because it is divible by the number of its divisors (288).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is not an unprimeable number, because it can be changed into a prime (51300001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2699991 + ... + 2700009.

It is an arithmetic number, because the mean of its divisors is an integer number (683550).

Almost surely, 2^51300000 is an apocalyptic number.

51300000 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 51300000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98431200).

51300000 is an abundant number, since it is smaller than the sum of its proper divisors (145562400).

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

51300000 is an equidigital number, since it uses as much as digits as its factorization.

51300000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63 (or 29 counting only the distinct ones).

The product of its (nonzero) digits is 15, while the sum is 9.

The square root of 51300000 is about 7162.4018317880. The cubic root of 51300000 is about 371.5686988891.

Adding to 51300000 its reverse (315), we get a palindrome (51300315).

The spelling of 51300000 in words is "fifty-one million, three hundred thousand".