51003680 has 192 divisors, whose sum is σ = 154441728. Its totient is φ = 15482880.

The previous prime is 51003679. The next prime is 51003707. The reversal of 51003680 is 8630015.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 451304 + ... + 451416.

It is an arithmetic number, because the mean of its divisors is an integer number (804384).

Almost surely, 2^51003680 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51003680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77220864).

51003680 is an abundant number, since it is smaller than the sum of its proper divisors (103438048).

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

51003680 is a wasteful number, since it uses less digits than its factorization.

51003680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179 (or 171 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 51003680 is about 7141.6860754306. The cubic root of 51003680 is about 370.8518963340.

Adding to 51003680 its reverse (8630015), we get a palindrome (59633695).

The spelling of 51003680 in words is "fifty-one million, three thousand, six hundred eighty".