51077857 has 2 divisors, whose sum is σ = 51077858. Its totient is φ = 51077856.

The previous prime is 51077827. The next prime is 51077867. The reversal of 51077857 is 75877015.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33362176 + 17715681 = 5776^2 + 4209^2 .

It is a cyclic number.

It is not a de Polignac number, because 51077857 - 2¹¹ = 51075809 is a prime.

It is not a weakly prime, because it can be changed into another prime (51077827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25538928 + 25538929.

It is an arithmetic number, because the mean of its divisors is an integer number (25538929).

Almost surely, 2^51077857 is an apocalyptic number.

It is an amenable number.

51077857 is a deficient number, since it is larger than the sum of its proper divisors (1).

51077857 is an equidigital number, since it uses as much as digits as its factorization.

51077857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 68600, while the sum is 40.

The square root of 51077857 is about 7146.8774300389. The cubic root of 51077857 is about 371.0315915780.

The spelling of 51077857 in words is "fifty-one million, seventy-seven thousand, eight hundred fifty-seven".