51729120 has 72 divisors (see below), whose sum is σ = 176530536. Its totient is φ = 13794048.

The previous prime is 51729107. The next prime is 51729131. The reversal of 51729120 is 2192715.

51729120 is a `hidden beast` number, since 517 + 29 + 120 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16522 + ... + 19401.

It is an arithmetic number, because the mean of its divisors is an integer number (2451813).

Almost surely, 2^51729120 is an apocalyptic number.

It is an amenable number.

51729120 is an abundant number, since it is smaller than the sum of its proper divisors (124801416).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51729120 is a wasteful number, since it uses less digits than its factorization.

51729120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35944 (or 35933 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 51729120 is about 7192.2958782297. The cubic root of 51729120 is about 372.6018699508.

The spelling of 51729120 in words is "fifty-one million, seven hundred twenty-nine thousand, one hundred twenty".