51240543 has 16 divisors (see below), whose sum is σ = 69538560. Its totient is φ = 33557184.

The previous prime is 51240493. The next prime is 51240547. The reversal of 51240543 is 34504215.

It is not a de Polignac number, because 51240543 - 2¹⁰ = 51239519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51240547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42355 + ... + 43547.

It is an arithmetic number, because the mean of its divisors is an integer number (4346160).

Almost surely, 2^51240543 is an apocalyptic number.

51240543 is a deficient number, since it is larger than the sum of its proper divisors (18298017).

51240543 is a wasteful number, since it uses less digits than its factorization.

51240543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1438.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 51240543 is about 7158.2499956344. The cubic root of 51240543 is about 371.4250932965.

Adding to 51240543 its reverse (34504215), we get a palindrome (85744758).

The spelling of 51240543 in words is "fifty-one million, two hundred forty thousand, five hundred forty-three".