51788887 has 2 divisors, whose sum is σ = 51788888. Its totient is φ = 51788886.

The previous prime is 51788873. The next prime is 51788911. The reversal of 51788887 is 78888715.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51788887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51788827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25894443 + 25894444.

It is an arithmetic number, because the mean of its divisors is an integer number (25894444).

Almost surely, 2^51788887 is an apocalyptic number.

51788887 is a deficient number, since it is larger than the sum of its proper divisors (1).

51788887 is an equidigital number, since it uses as much as digits as its factorization.

51788887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1003520, while the sum is 52.

The square root of 51788887 is about 7196.4496107456. The cubic root of 51788887 is about 372.7453141394.

The spelling of 51788887 in words is "fifty-one million, seven hundred eighty-eight thousand, eight hundred eighty-seven".