51225800 has 24 divisors (see below), whose sum is σ = 119100450. Its totient is φ = 20490240.

The previous prime is 51225799. The next prime is 51225821. The reversal of 51225800 is 852215.

It can be written as a sum of positive squares in 3 ways, for example, as 39212644 + 12013156 = 6262^2 + 3466^2 .

It is an unprimeable number.

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, 127865 + ... + 128264.

Almost surely, 2^51225800 is an apocalyptic number.

51225800 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51225800 is an abundant number, since it is smaller than the sum of its proper divisors (67874650).

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

51225800 is a wasteful number, since it uses less digits than its factorization.

51225800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256145 (or 256136 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 51225800 is about 7157.2201307491. The cubic root of 51225800 is about 371.3894675655.

It can be divided in two parts, 51225 and 800, that added together give a palindrome (52025).

The spelling of 51225800 in words is "fifty-one million, two hundred twenty-five thousand, eight hundred".