540500321243 has 4 divisors (see below), whose sum is σ = 541704108600. Its totient is φ = 539296533888.

The previous prime is 540500321239. The next prime is 540500321261. The reversal of 540500321243 is 342123005045.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 540500321243 - 2² = 540500321239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (540500323243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 601893005 + ... + 601893902.

It is an arithmetic number, because the mean of its divisors is an integer number (135426027150).

Almost surely, 2^540500321243 is an apocalyptic number.

540500321243 is a deficient number, since it is larger than the sum of its proper divisors (1203787357).

540500321243 is a wasteful number, since it uses less digits than its factorization.

540500321243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1203787356.

The product of its (nonzero) digits is 14400, while the sum is 29.

Adding to 540500321243 its reverse (342123005045), we get a palindrome (882623326288).

The spelling of 540500321243 in words is "five hundred forty billion, five hundred million, three hundred twenty-one thousand, two hundred forty-three".