51139291171 has 2 divisors, whose sum is σ = 51139291172. Its totient is φ = 51139291170.

The previous prime is 51139291169. The next prime is 51139291243. The reversal of 51139291171 is 17119293115.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51139291171 - 2¹ = 51139291169 is a prime.

Together with 51139291169, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (51139291571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25569645585 + 25569645586.

It is an arithmetic number, because the mean of its divisors is an integer number (25569645586).

Almost surely, 2^51139291171 is an apocalyptic number.

51139291171 is a deficient number, since it is larger than the sum of its proper divisors (1).

51139291171 is an equidigital number, since it uses as much as digits as its factorization.

51139291171 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17010, while the sum is 40.

The spelling of 51139291171 in words is "fifty-one billion, one hundred thirty-nine million, two hundred ninety-one thousand, one hundred seventy-one".