51865867 has 2 divisors, whose sum is σ = 51865868. Its totient is φ = 51865866.

The previous prime is 51865837. The next prime is 51865873. The reversal of 51865867 is 76856815.

51865867 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 51865867 - 2⁷ = 51865739 is a prime.

It is not a weakly prime, because it can be changed into another prime (51865817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25932933 + 25932934.

It is an arithmetic number, because the mean of its divisors is an integer number (25932934).

Almost surely, 2^51865867 is an apocalyptic number.

51865867 is a deficient number, since it is larger than the sum of its proper divisors (1).

51865867 is an equidigital number, since it uses as much as digits as its factorization.

51865867 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 403200, while the sum is 46.

The square root of 51865867 is about 7201.7960954195. The cubic root of 51865867 is about 372.9299079818.

The spelling of 51865867 in words is "fifty-one million, eight hundred sixty-five thousand, eight hundred sixty-seven".