51807773 has 2 divisors, whose sum is σ = 51807774. Its totient is φ = 51807772.

The previous prime is 51807761. The next prime is 51807779. The reversal of 51807773 is 37770815.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51523684 + 284089 = 7178^2 + 533^2 .

It is a cyclic number.

It is not a de Polignac number, because 51807773 - 2²⁰ = 50759197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51807779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25903886 + 25903887.

It is an arithmetic number, because the mean of its divisors is an integer number (25903887).

Almost surely, 2^51807773 is an apocalyptic number.

It is an amenable number.

51807773 is a deficient number, since it is larger than the sum of its proper divisors (1).

51807773 is an equidigital number, since it uses as much as digits as its factorization.

51807773 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41160, while the sum is 38.

The square root of 51807773 is about 7197.7616659626. The cubic root of 51807773 is about 372.7906186623.

The spelling of 51807773 in words is "fifty-one million, eight hundred seven thousand, seven hundred seventy-three".