51147732 has 12 divisors (see below), whose sum is σ = 119344736. Its totient is φ = 17049240.

The previous prime is 51147721. The next prime is 51147739. The reversal of 51147732 is 23774115.

51147732 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 51147732.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51147739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2131144 + ... + 2131167.

Almost surely, 2^51147732 is an apocalyptic number.

It is an amenable number.

51147732 is an abundant number, since it is smaller than the sum of its proper divisors (68197004).

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

51147732 is a wasteful number, since it uses less digits than its factorization.

51147732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4262318 (or 4262316 counting only the distinct ones).

The product of its digits is 5880, while the sum is 30.

The square root of 51147732 is about 7151.7642578597. The cubic root of 51147732 is about 371.2007060808.

The spelling of 51147732 in words is "fifty-one million, one hundred forty-seven thousand, seven hundred thirty-two".