51550110109 has 2 divisors, whose sum is σ = 51550110110. Its totient is φ = 51550110108.

The previous prime is 51550110023. The next prime is 51550110137. The reversal of 51550110109 is 90101105515.

It is an a-pointer prime, because the next prime (51550110137) can be obtained adding 51550110109 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50006798884 + 1543311225 = 223622^2 + 39285^2 .

It is a cyclic number.

It is not a de Polignac number, because 51550110109 - 2¹⁷ = 51549979037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51550110809) 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, 25775055054 + 25775055055.

It is an arithmetic number, because the mean of its divisors is an integer number (25775055055).

Almost surely, 2^51550110109 is an apocalyptic number.

It is an amenable number.

51550110109 is a deficient number, since it is larger than the sum of its proper divisors (1).

51550110109 is an equidigital number, since it uses as much as digits as its factorization.

51550110109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1125, while the sum is 28.

The spelling of 51550110109 in words is "fifty-one billion, five hundred fifty million, one hundred ten thousand, one hundred nine".