540042322321 has 4 divisors (see below), whose sum is σ = 540219446500. Its totient is φ = 539865198144.

The previous prime is 540042322291. The next prime is 540042322349. The reversal of 540042322321 is 123223240045.

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

It can be written as a sum of positive squares in 2 ways, for example, as 123088003921 + 416954318400 = 350839^2 + 645720^2 .

It is a cyclic number.

It is not a de Polignac number, because 540042322321 - 2⁵ = 540042322289 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 540042322321.

It is not an unprimeable number, because it can be changed into a prime (540042322921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88557516 + ... + 88563613.

It is an arithmetic number, because the mean of its divisors is an integer number (135054861625).

Almost surely, 2^540042322321 is an apocalyptic number.

It is an amenable number.

540042322321 is a deficient number, since it is larger than the sum of its proper divisors (177124179).

540042322321 is a wasteful number, since it uses less digits than its factorization.

540042322321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177124178.

The product of its (nonzero) digits is 11520, while the sum is 28.

Adding to 540042322321 its reverse (123223240045), we get a palindrome (663265562366).

The spelling of 540042322321 in words is "five hundred forty billion, forty-two million, three hundred twenty-two thousand, three hundred twenty-one".