51016550 has 24 divisors (see below), whose sum is σ = 102191376. Its totient is φ = 18836640.

The previous prime is 51016543. The next prime is 51016571. The reversal of 51016550 is 5561015.

51016550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 38594 + ... + 39893.

It is an arithmetic number, because the mean of its divisors is an integer number (4257974).

Almost surely, 2^51016550 is an apocalyptic number.

51016550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51016550 is an abundant number, since it is smaller than the sum of its proper divisors (51174826).

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

51016550 is a wasteful number, since it uses less digits than its factorization.

51016550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78512 (or 78507 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 51016550 is about 7142.5870663227. The cubic root of 51016550 is about 370.8830866488.

Adding to 51016550 its reverse (5561015), we get a palindrome (56577565).

The spelling of 51016550 in words is "fifty-one million, sixteen thousand, five hundred fifty".