51068681 has 8 divisors (see below), whose sum is σ = 53500800. Its totient is φ = 48681360.

The previous prime is 51068669. The next prime is 51068729. The reversal of 51068681 is 18686015.

51068681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51068681 - 2¹⁰ = 51067657 is a prime.

It is a super-2 number, since 2×51068681² = 5216020358159522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51068581) 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 7 ways as a sum of consecutive naturals, for example, 8855 + ... + 13436.

It is an arithmetic number, because the mean of its divisors is an integer number (6687600).

Almost surely, 2^51068681 is an apocalyptic number.

It is an amenable number.

51068681 is a deficient number, since it is larger than the sum of its proper divisors (2432119).

51068681 is a wasteful number, since it uses less digits than its factorization.

51068681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22399.

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 51068681 is about 7146.2354425250. The cubic root of 51068681 is about 371.0093719707.

The spelling of 51068681 in words is "fifty-one million, sixty-eight thousand, six hundred eighty-one".