51087887 has 2 divisors, whose sum is σ = 51087888. Its totient is φ = 51087886.

The previous prime is 51087859. The next prime is 51087893. The reversal of 51087887 is 78878015.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51087887 - 2⁶ = 51087823 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51087587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25543943 + 25543944.

It is an arithmetic number, because the mean of its divisors is an integer number (25543944).

Almost surely, 2^51087887 is an apocalyptic number.

51087887 is a deficient number, since it is larger than the sum of its proper divisors (1).

51087887 is an equidigital number, since it uses as much as digits as its factorization.

51087887 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 125440, while the sum is 44.

The square root of 51087887 is about 7147.5791006466. The cubic root of 51087887 is about 371.0558760953.

The spelling of 51087887 in words is "fifty-one million, eighty-seven thousand, eight hundred eighty-seven".