51108910087 has 2 divisors, whose sum is σ = 51108910088. Its totient is φ = 51108910086.

The previous prime is 51108910079. The next prime is 51108910117. The reversal of 51108910087 is 78001980115.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51108910087 - 2³ = 51108910079 is a prime.

It is a super-2 number, since 2×51108910087² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51108910387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25554455043 + 25554455044.

It is an arithmetic number, because the mean of its divisors is an integer number (25554455044).

Almost surely, 2^51108910087 is an apocalyptic number.

51108910087 is a deficient number, since it is larger than the sum of its proper divisors (1).

51108910087 is an equidigital number, since it uses as much as digits as its factorization.

51108910087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 40.

The spelling of 51108910087 in words is "fifty-one billion, one hundred eight million, nine hundred ten thousand, eighty-seven".