51278312 has 16 divisors (see below), whose sum is σ = 96637860. Its totient is φ = 25508224.

The previous prime is 51278303. The next prime is 51278323. The reversal of 51278312 is 21387215.

51278312 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 51179716 + 98596 = 7154^2 + 314^2 .

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 3 ways as a sum of consecutive naturals, for example, 14693 + ... + 17844.

Almost surely, 2^51278312 is an apocalyptic number.

It is an amenable number.

51278312 is a deficient number, since it is larger than the sum of its proper divisors (45359548).

51278312 is a wasteful number, since it uses less digits than its factorization.

51278312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32740 (or 32736 counting only the distinct ones).

The product of its digits is 3360, while the sum is 29.

The square root of 51278312 is about 7160.8876544741. The cubic root of 51278312 is about 371.5163290525.

The spelling of 51278312 in words is "fifty-one million, two hundred seventy-eight thousand, three hundred twelve".