51729663 has 8 divisors (see below), whose sum is σ = 70837168. Its totient is φ = 33554304.

The previous prime is 51729617. The next prime is 51729683. The reversal of 51729663 is 36692715.

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

It is not a de Polignac number, because 51729663 - 2¹⁰ = 51728639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51729683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 232906 + ... + 233127.

It is an arithmetic number, because the mean of its divisors is an integer number (8854646).

Almost surely, 2^51729663 is an apocalyptic number.

51729663 is a deficient number, since it is larger than the sum of its proper divisors (19107505).

51729663 is a wasteful number, since it uses less digits than its factorization.

51729663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466073.

The product of its digits is 68040, while the sum is 39.

The square root of 51729663 is about 7192.3336268558. Note that the first 3 decimals coincide. The cubic root of 51729663 is about 372.6031736789.

The spelling of 51729663 in words is "fifty-one million, seven hundred twenty-nine thousand, six hundred sixty-three".