51278116 has 12 divisors (see below), whose sum is σ = 90422640. Its totient is φ = 25443080.

The previous prime is 51278111. The next prime is 51278153. The reversal of 51278116 is 61187215.

It is not an unprimeable number, because it can be changed into a prime (51278111) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 48406 + ... + 49453.

It is an arithmetic number, because the mean of its divisors is an integer number (7535220).

Almost surely, 2^51278116 is an apocalyptic number.

It is an amenable number.

51278116 is a deficient number, since it is larger than the sum of its proper divisors (39144524).

51278116 is a wasteful number, since it uses less digits than its factorization.

51278116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97994 (or 97992 counting only the distinct ones).

The product of its digits is 3360, while the sum is 31.

The square root of 51278116 is about 7160.8739690069. The cubic root of 51278116 is about 371.5158557056.

Subtracting 51278116 from its reverse (61187215), we obtain a palindrome (9909099).

The spelling of 51278116 in words is "fifty-one million, two hundred seventy-eight thousand, one hundred sixteen".