51384732 has 72 divisors (see below), whose sum is σ = 144023040. Its totient is φ = 14202720.

The previous prime is 51384713. The next prime is 51384733. The reversal of 51384732 is 23748315.

It is a junction number, because it is equal to n+sod(n) for n = 51384693 and 51384702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51384733) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16819 + ... + 19637.

It is an arithmetic number, because the mean of its divisors is an integer number (2000320).

Almost surely, 2^51384732 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 51384732, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72011520).

51384732 is an abundant number, since it is smaller than the sum of its proper divisors (92638308).

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

51384732 is a wasteful number, since it uses less digits than its factorization.

51384732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2871 (or 2862 counting only the distinct ones).

The product of its digits is 20160, while the sum is 33.

The square root of 51384732 is about 7168.3144462279. The cubic root of 51384732 is about 371.7731591946.

It can be divided in two parts, 5138 and 4732, that added together give a triangular number (9870 = T₁₄₀).

The spelling of 51384732 in words is "fifty-one million, three hundred eighty-four thousand, seven hundred thirty-two".