51356009 has 2 divisors, whose sum is σ = 51356010. Its totient is φ = 51356008.

The previous prime is 51356003. The next prime is 51356017. The reversal of 51356009 is 90065315.

51356009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43930384 + 7425625 = 6628^2 + 2725^2 .

It is a cyclic number.

It is not a de Polignac number, because 51356009 - 2⁸ = 51355753 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (51356003) 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, 25678004 + 25678005.

It is an arithmetic number, because the mean of its divisors is an integer number (25678005).

Almost surely, 2^51356009 is an apocalyptic number.

It is an amenable number.

51356009 is a deficient number, since it is larger than the sum of its proper divisors (1).

51356009 is an equidigital number, since it uses as much as digits as its factorization.

51356009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4050, while the sum is 29.

The square root of 51356009 is about 7166.3106965858. The cubic root of 51356009 is about 371.7038751204.

The spelling of 51356009 in words is "fifty-one million, three hundred fifty-six thousand, nine".