51108910387 has 2 divisors, whose sum is σ = 51108910388. Its totient is φ = 51108910386.

The previous prime is 51108910343. The next prime is 51108910423. The reversal of 51108910387 is 78301980115.

51108910387 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 51108910387 - 2³¹ = 48961426739 is a prime.

It is a super-2 number, since 2×51108910387² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51108910087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25554455193 + 25554455194.

It is an arithmetic number, because the mean of its divisors is an integer number (25554455194).

Almost surely, 2^51108910387 is an apocalyptic number.

51108910387 is a deficient number, since it is larger than the sum of its proper divisors (1).

51108910387 is an equidigital number, since it uses as much as digits as its factorization.

51108910387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 43.

The spelling of 51108910387 in words is "fifty-one billion, one hundred eight million, nine hundred ten thousand, three hundred eighty-seven".