51281600 has 42 divisors (see below), whose sum is σ = 126188724. Its totient is φ = 20512000.

The previous prime is 51281597. The next prime is 51281621. The reversal of 51281600 is 618215.

51281600 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14426 + ... + 17625.

Almost surely, 2^51281600 is an apocalyptic number.

51281600 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51281600 is an abundant number, since it is smaller than the sum of its proper divisors (74907124).

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

51281600 is a wasteful number, since it uses less digits than its factorization.

51281600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32073 (or 32058 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 51281600 is about 7161.1172312706. The cubic root of 51281600 is about 371.5242695088.

Adding to 51281600 its reverse (618215), we get a palindrome (51899815).

The spelling of 51281600 in words is "fifty-one million, two hundred eighty-one thousand, six hundred".