51143775 has 24 divisors (see below), whose sum is σ = 84823440. Its totient is φ = 27191040.

The previous prime is 51143773. The next prime is 51143777. The reversal of 51143775 is 57734115.

51143775 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (51143773) and next prime (51143777).

It is not a de Polignac number, because 51143775 - 2¹ = 51143773 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51143773) 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 23 ways as a sum of consecutive naturals, for example, 28299 + ... + 30051.

It is an arithmetic number, because the mean of its divisors is an integer number (3534310).

Almost surely, 2^51143775 is an apocalyptic number.

51143775 is a deficient number, since it is larger than the sum of its proper divisors (33679665).

51143775 is a wasteful number, since it uses less digits than its factorization.

51143775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2155 (or 2150 counting only the distinct ones).

The product of its digits is 14700, while the sum is 33.

The square root of 51143775 is about 7151.4876074842. The cubic root of 51143775 is about 371.1911332936.

The spelling of 51143775 in words is "fifty-one million, one hundred forty-three thousand, seven hundred seventy-five".