51729911 has 8 divisors (see below), whose sum is σ = 52545600. Its totient is φ = 50918400.

The previous prime is 51729901. The next prime is 51729919. The reversal of 51729911 is 11992715.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51729911 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 (51729919) 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, 31511 + ... + 33111.

It is an arithmetic number, because the mean of its divisors is an integer number (6568200).

Almost surely, 2^51729911 is an apocalyptic number.

51729911 is a deficient number, since it is larger than the sum of its proper divisors (815689).

51729911 is a wasteful number, since it uses less digits than its factorization.

51729911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2089.

The product of its digits is 5670, while the sum is 35.

The square root of 51729911 is about 7192.3508674146. The cubic root of 51729911 is about 372.6037691170.

The spelling of 51729911 in words is "fifty-one million, seven hundred twenty-nine thousand, nine hundred eleven".