51543460 has 48 divisors (see below), whose sum is σ = 114307200. Its totient is φ = 19483904.

The previous prime is 51543449. The next prime is 51543491. The reversal of 51543460 is 6434515.

51543460 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 40311 + ... + 41569.

It is an arithmetic number, because the mean of its divisors is an integer number (2381400).

Almost surely, 2^51543460 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 51543460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57153600).

51543460 is an abundant number, since it is smaller than the sum of its proper divisors (62763740).

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

51543460 is a wasteful number, since it uses less digits than its factorization.

51543460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1380 (or 1378 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 51543460 is about 7179.3774103330. The cubic root of 51543460 is about 372.1555694949.

Adding to 51543460 its reverse (6434515), we get a palindrome (57977975).

It can be divided in two parts, 51543 and 460, that added together give a triangular number (52003 = T₃₂₂).

The spelling of 51543460 in words is "fifty-one million, five hundred forty-three thousand, four hundred sixty".