51777871 has 2 divisors, whose sum is σ = 51777872. Its totient is φ = 51777870.

The previous prime is 51777863. The next prime is 51777877. The reversal of 51777871 is 17877715.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51777871 - 2³ = 51777863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51777877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25888935 + 25888936.

It is an arithmetic number, because the mean of its divisors is an integer number (25888936).

Almost surely, 2^51777871 is an apocalyptic number.

51777871 is a deficient number, since it is larger than the sum of its proper divisors (1).

51777871 is an equidigital number, since it uses as much as digits as its factorization.

51777871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96040, while the sum is 43.

The square root of 51777871 is about 7195.6841926255. The cubic root of 51777871 is about 372.7188834140.

The spelling of 51777871 in words is "fifty-one million, seven hundred seventy-seven thousand, eight hundred seventy-one".