51305516 has 6 divisors (see below), whose sum is σ = 89784660. Its totient is φ = 25652756.

The previous prime is 51305483. The next prime is 51305521. The reversal of 51305516 is 61550315.

51305516 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 as a sum of consecutive naturals, namely, 6413186 + ... + 6413193.

It is an arithmetic number, because the mean of its divisors is an integer number (14964110).

Almost surely, 2^51305516 is an apocalyptic number.

It is an amenable number.

51305516 is a deficient number, since it is larger than the sum of its proper divisors (38479144).

51305516 is a wasteful number, since it uses less digits than its factorization.

51305516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12826383 (or 12826381 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 26.

The square root of 51305516 is about 7162.7868877972. The cubic root of 51305516 is about 371.5820159747.

The spelling of 51305516 in words is "fifty-one million, three hundred five thousand, five hundred sixteen".