51777727 has 6 divisors (see below), whose sum is σ = 52326528. Its totient is φ = 51234624.

The previous prime is 51777721. The next prime is 51777743. The reversal of 51777727 is 72777715.

51777727 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51777727 - 2¹¹ = 51775679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51777721) 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 in 5 ways as a sum of consecutive naturals, for example, 6658 + ... + 12160.

It is an arithmetic number, because the mean of its divisors is an integer number (8721088).

Almost surely, 2^51777727 is an apocalyptic number.

51777727 is a deficient number, since it is larger than the sum of its proper divisors (548801).

51777727 is an frugal number, since it uses more digits than its factorization.

51777727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5697 (or 5600 counting only the distinct ones).

The product of its digits is 168070, while the sum is 43.

The square root of 51777727 is about 7195.6741866207. The cubic root of 51777727 is about 372.7185378895.

The spelling of 51777727 in words is "fifty-one million, seven hundred seventy-seven thousand, seven hundred twenty-seven".