51729538 has 16 divisors (see below), whose sum is σ = 93896064. Its totient is φ = 20865600.

The previous prime is 51729529. The next prime is 51729539. The reversal of 51729538 is 83592715.

It is a self number, because there is not a number n which added to its sum of digits gives 51729538.

It is not an unprimeable number, because it can be changed into a prime (51729539) 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, 108438 + ... + 108913.

It is an arithmetic number, because the mean of its divisors is an integer number (5868504).

Almost surely, 2^51729538 is an apocalyptic number.

51729538 is a deficient number, since it is larger than the sum of its proper divisors (42166526).

51729538 is a wasteful number, since it uses less digits than its factorization.

51729538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217377.

The product of its digits is 75600, while the sum is 40.

The square root of 51729538 is about 7192.3249370423. The cubic root of 51729538 is about 372.6028735581.

The spelling of 51729538 in words is "fifty-one million, seven hundred twenty-nine thousand, five hundred thirty-eight".