51277167222109 has 2 divisors, whose sum is σ = 51277167222110. Its totient is φ = 51277167222108.

The previous prime is 51277167222079. The next prime is 51277167222121. The reversal of 51277167222109 is 90122276177215.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27240601878009 + 24036565344100 = 5219253^2 + 4902710^2 .

It is a cyclic number.

It is not a de Polignac number, because 51277167222109 - 2⁵ = 51277167222077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51277167222509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25638583611054 + 25638583611055.

It is an arithmetic number, because the mean of its divisors is an integer number (25638583611055).

Almost surely, 2^{51277167222109} is an apocalyptic number.

It is an amenable number.

51277167222109 is a deficient number, since it is larger than the sum of its proper divisors (1).

51277167222109 is an equidigital number, since it uses as much as digits as its factorization.

51277167222109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1481760, while the sum is 52.

The spelling of 51277167222109 in words is "fifty-one trillion, two hundred seventy-seven billion, one hundred sixty-seven million, two hundred twenty-two thousand, one hundred nine".