51000775 has 24 divisors (see below), whose sum is σ = 75423744. Its totient is φ = 33448800.

The previous prime is 51000751. The next prime is 51000841. The reversal of 51000775 is 57700015.

51000775 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 51000775 - 2¹³ = 50992583 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 2311 + ... + 10360.

It is an arithmetic number, because the mean of its divisors is an integer number (3142656).

Almost surely, 2^51000775 is an apocalyptic number.

51000775 is a deficient number, since it is larger than the sum of its proper divisors (24422969).

51000775 is a wasteful number, since it uses less digits than its factorization.

51000775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12711 (or 12706 counting only the distinct ones).

The product of its (nonzero) digits is 1225, while the sum is 25.

The square root of 51000775 is about 7141.4826891900. The cubic root of 51000775 is about 370.8448553701.

The spelling of 51000775 in words is "fifty-one million, seven hundred seventy-five", and thus it is an aban number.