51171301787 has 2 divisors, whose sum is σ = 51171301788. Its totient is φ = 51171301786.

The previous prime is 51171301781. The next prime is 51171301789. The reversal of 51171301787 is 78710317115.

51171301787 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51171301787 - 2⁶ = 51171301723 is a prime.

Together with 51171301789, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51171301781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25585650893 + 25585650894.

It is an arithmetic number, because the mean of its divisors is an integer number (25585650894).

Almost surely, 2^51171301787 is an apocalyptic number.

51171301787 is a deficient number, since it is larger than the sum of its proper divisors (1).

51171301787 is an equidigital number, since it uses as much as digits as its factorization.

51171301787 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41160, while the sum is 41.

The spelling of 51171301787 in words is "fifty-one billion, one hundred seventy-one million, three hundred one thousand, seven hundred eighty-seven".