51729811 has 8 divisors (see below), whose sum is σ = 60717920. Its totient is φ = 43141248.

The previous prime is 51729803. The next prime is 51729841. The reversal of 51729811 is 11892715.

It is a happy number.

51729811 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 51729811 - 2³ = 51729803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51729841) 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, 99606 + ... + 100123.

It is an arithmetic number, because the mean of its divisors is an integer number (7589740).

Almost surely, 2^51729811 is an apocalyptic number.

51729811 is a deficient number, since it is larger than the sum of its proper divisors (8988109).

51729811 is a wasteful number, since it uses less digits than its factorization.

51729811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199773.

The product of its digits is 5040, while the sum is 34.

The square root of 51729811 is about 7192.3439155813. The cubic root of 51729811 is about 372.6035290212.

The spelling of 51729811 in words is "fifty-one million, seven hundred twenty-nine thousand, eight hundred eleven".