51729552 has 240 divisors, whose sum is σ = 181317760. Its totient is φ = 13436928.

The previous prime is 51729539. The next prime is 51729583. The reversal of 51729552 is 25592715.

51729552 is a `hidden beast` number, since 517 + 2 + 95 + 52 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

Its product of digits (31500) is a multiple of the sum of its prime factors (150).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 708588 + ... + 708660.

Almost surely, 2^51729552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51729552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90658880).

51729552 is an abundant number, since it is smaller than the sum of its proper divisors (129588208).

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

51729552 is a wasteful number, since it uses less digits than its factorization.

51729552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150 (or 141 counting only the distinct ones).

The product of its digits is 31500, while the sum is 36.

The square root of 51729552 is about 7192.3259103019. The cubic root of 51729552 is about 372.6029071717.

The spelling of 51729552 in words is "fifty-one million, seven hundred twenty-nine thousand, five hundred fifty-two".