51081727 has 2 divisors, whose sum is σ = 51081728. Its totient is φ = 51081726.

The previous prime is 51081703. The next prime is 51081733. The reversal of 51081727 is 72718015.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51081727 - 2⁷ = 51081599 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51084727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25540863 + 25540864.

It is an arithmetic number, because the mean of its divisors is an integer number (25540864).

Almost surely, 2^51081727 is an apocalyptic number.

51081727 is a deficient number, since it is larger than the sum of its proper divisors (1).

51081727 is an equidigital number, since it uses as much as digits as its factorization.

51081727 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3920, while the sum is 31.

The square root of 51081727 is about 7147.1481725231. The cubic root of 51081727 is about 371.0409619528.

The spelling of 51081727 in words is "fifty-one million, eighty-one thousand, seven hundred twenty-seven".