51302800 has 30 divisors (see below), whose sum is σ = 123255938. Its totient is φ = 20520960.

The previous prime is 51302777. The next prime is 51302809. The reversal of 51302800 is 820315.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 13307904 + 37994896 = 3648^2 + 6164^2 .

It is not an unprimeable number, because it can be changed into a prime (51302809) 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 5 ways as a sum of consecutive naturals, for example, 63729 + ... + 64528.

Almost surely, 2^51302800 is an apocalyptic number.

51302800 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51302800 is an abundant number, since it is smaller than the sum of its proper divisors (71953138).

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

51302800 is a wasteful number, since it uses less digits than its factorization.

51302800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128275 (or 128264 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 51302800 is about 7162.5972942781. The cubic root of 51302800 is about 371.5754589503.

The spelling of 51302800 in words is "fifty-one million, three hundred two thousand, eight hundred".