51278933 has 2 divisors, whose sum is σ = 51278934. Its totient is φ = 51278932.

The previous prime is 51278911. The next prime is 51278939. The reversal of 51278933 is 33987215.

51278933 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47306884 + 3972049 = 6878^2 + 1993^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51278933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51278939) by changing a digit.

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, 25639466 + 25639467.

It is an arithmetic number, because the mean of its divisors is an integer number (25639467).

Almost surely, 2^51278933 is an apocalyptic number.

It is an amenable number.

51278933 is a deficient number, since it is larger than the sum of its proper divisors (1).

51278933 is an equidigital number, since it uses as much as digits as its factorization.

51278933 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45360, while the sum is 38.

The square root of 51278933 is about 7160.9310148891. The cubic root of 51278933 is about 371.5178287815.

The spelling of 51278933 in words is "fifty-one million, two hundred seventy-eight thousand, nine hundred thirty-three".