51065779 has 2 divisors, whose sum is σ = 51065780. Its totient is φ = 51065778.

The previous prime is 51065767. The next prime is 51065801. The reversal of 51065779 is 97756015.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51065779 - 2¹⁷ = 50934707 is a prime.

It is not a weakly prime, because it can be changed into another prime (51065759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25532889 + 25532890.

It is an arithmetic number, because the mean of its divisors is an integer number (25532890).

Almost surely, 2^51065779 is an apocalyptic number.

51065779 is a deficient number, since it is larger than the sum of its proper divisors (1).

51065779 is an equidigital number, since it uses as much as digits as its factorization.

51065779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 66150, while the sum is 40.

The square root of 51065779 is about 7146.0323956724. The cubic root of 51065779 is about 371.0023442479.

The spelling of 51065779 in words is "fifty-one million, sixty-five thousand, seven hundred seventy-nine".