51000777 has 12 divisors (see below), whose sum is σ = 73787844. Its totient is φ = 33945120.

The previous prime is 51000751. The next prime is 51000841. The reversal of 51000777 is 77700015.

It can be written as a sum of positive squares in 2 ways, for example, as 28901376 + 22099401 = 5376^2 + 4701^2 .

It is not a de Polignac number, because 51000777 - 2⁶ = 51000713 is a prime.

51000777 is a modest number, since divided by 777 gives 51 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 51000777.

It is not an unprimeable number, because it can be changed into a prime (51000707) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1663 + ... + 10235.

It is an arithmetic number, because the mean of its divisors is an integer number (6148987).

Almost surely, 2^51000777 is an apocalyptic number.

It is an amenable number.

51000777 is a deficient number, since it is larger than the sum of its proper divisors (22787067).

51000777 is a wasteful number, since it uses less digits than its factorization.

51000777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9240 (or 9237 counting only the distinct ones).

The product of its (nonzero) digits is 1715, while the sum is 27.

The square root of 51000777 is about 7141.4828292169. The cubic root of 51000777 is about 370.8448602177.

The spelling of 51000777 in words is "fifty-one million, seven hundred seventy-seven", and thus it is an aban number.