51811768 has 8 divisors (see below), whose sum is σ = 97147080. Its totient is φ = 25905880.

The previous prime is 51811759. The next prime is 51811769. The reversal of 51811768 is 86711815.

51811768 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51811769) 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 as a sum of consecutive naturals, namely, 3238228 + ... + 3238243.

It is an arithmetic number, because the mean of its divisors is an integer number (12143385).

Almost surely, 2^51811768 is an apocalyptic number.

It is an amenable number.

51811768 is a deficient number, since it is larger than the sum of its proper divisors (45335312).

51811768 is a wasteful number, since it uses less digits than its factorization.

51811768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6476477 (or 6476473 counting only the distinct ones).

The product of its digits is 13440, while the sum is 37.

The square root of 51811768 is about 7198.0391774427. The cubic root of 51811768 is about 372.8002006237.

The spelling of 51811768 in words is "fifty-one million, eight hundred eleven thousand, seven hundred sixty-eight".