51043540 has 24 divisors (see below), whose sum is σ = 107325792. Its totient is φ = 20391840.

The previous prime is 51043513. The next prime is 51043561. The reversal of 51043540 is 4534015.

51043540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 29787 + ... + 31453.

It is an arithmetic number, because the mean of its divisors is an integer number (4471908).

Almost surely, 2^51043540 is an apocalyptic number.

It is an amenable number.

51043540 is an abundant number, since it is smaller than the sum of its proper divisors (56282252).

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

51043540 is a wasteful number, since it uses less digits than its factorization.

51043540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3207 (or 3205 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 51043540 is about 7144.4761879371. The cubic root of 51043540 is about 370.9484796096.

Adding to 51043540 its reverse (4534015), we get a palindrome (55577555).

The spelling of 51043540 in words is "fifty-one million, forty-three thousand, five hundred forty".