51125779 has 2 divisors, whose sum is σ = 51125780. Its totient is φ = 51125778.

The previous prime is 51125773. The next prime is 51125807. The reversal of 51125779 is 97752115.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51125779 - 2³ = 51125771 is a prime.

It is a super-2 number, since 2×51125779² = 5227690556713682, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51125771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25562889 + 25562890.

It is an arithmetic number, because the mean of its divisors is an integer number (25562890).

Almost surely, 2^51125779 is an apocalyptic number.

51125779 is a deficient number, since it is larger than the sum of its proper divisors (1).

51125779 is an equidigital number, since it uses as much as digits as its factorization.

51125779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22050, while the sum is 37.

The square root of 51125779 is about 7150.2292970226. The cubic root of 51125779 is about 371.1475910815.

The spelling of 51125779 in words is "fifty-one million, one hundred twenty-five thousand, seven hundred seventy-nine".