51005512087 has 2 divisors, whose sum is σ = 51005512088. Its totient is φ = 51005512086.

The previous prime is 51005512079. The next prime is 51005512123. The reversal of 51005512087 is 78021550015.

51005512087 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51005512087 - 2³ = 51005512079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51005512387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25502756043 + 25502756044.

It is an arithmetic number, because the mean of its divisors is an integer number (25502756044).

Almost surely, 2^51005512087 is an apocalyptic number.

51005512087 is a deficient number, since it is larger than the sum of its proper divisors (1).

51005512087 is an equidigital number, since it uses as much as digits as its factorization.

51005512087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14000, while the sum is 34.

The spelling of 51005512087 in words is "fifty-one billion, five million, five hundred twelve thousand, eighty-seven".