51050009 has 2 divisors, whose sum is σ = 51050010. Its totient is φ = 51050008.

The previous prime is 51049981. The next prime is 51050029. The reversal of 51050009 is 90005015.

51050009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (51050029) can be obtained adding 51050009 to its sum of digits (20).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45265984 + 5784025 = 6728^2 + 2405^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51050009 is a prime.

It is a super-2 number, since 2×51050009² = 5212206837800162, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51050029) 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, 25525004 + 25525005.

It is an arithmetic number, because the mean of its divisors is an integer number (25525005).

Almost surely, 2^51050009 is an apocalyptic number.

It is an amenable number.

51050009 is a deficient number, since it is larger than the sum of its proper divisors (1).

51050009 is an equidigital number, since it uses as much as digits as its factorization.

51050009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 225, while the sum is 20.

The square root of 51050009 is about 7144.9289009759. The cubic root of 51050009 is about 370.9641496588.

The spelling of 51050009 in words is "fifty-one million, fifty thousand, nine".