51756081 has 48 divisors (see below), whose sum is σ = 80110080. Its totient is φ = 29652480.

The previous prime is 51756073. The next prime is 51756083. The reversal of 51756081 is 18065715.

51756081 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 51756081 - 2³ = 51756073 is a prime.

It is a super-2 number, since 2×51756081² = 5357383840957122, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51756083) 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 47 ways as a sum of consecutive naturals, for example, 581485 + ... + 581573.

It is an arithmetic number, because the mean of its divisors is an integer number (1668960).

Almost surely, 2^51756081 is an apocalyptic number.

It is an amenable number.

51756081 is a deficient number, since it is larger than the sum of its proper divisors (28353999).

51756081 is a wasteful number, since it uses less digits than its factorization.

51756081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186 (or 173 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 33.

The square root of 51756081 is about 7194.1699312707. The cubic root of 51756081 is about 372.6665915510. Note that the first 3 decimals are identical.

The spelling of 51756081 in words is "fifty-one million, seven hundred fifty-six thousand, eighty-one".