540003303221 has 4 divisors (see below), whose sum is σ = 543124709772. Its totient is φ = 536881896672.

The previous prime is 540003303197. The next prime is 540003303223. The reversal of 540003303221 is 122303300045.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122303300045 = 5 ⋅24460660009.

It can be written as a sum of positive squares in 2 ways, for example, as 304764723025 + 235238580196 = 552055^2 + 485014^2 .

It is a cyclic number.

It is not a de Polignac number, because 540003303221 - 2¹⁰ = 540003302197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (540003303223) 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, 1560703016 + ... + 1560703361.

It is an arithmetic number, because the mean of its divisors is an integer number (135781177443).

Almost surely, 2^540003303221 is an apocalyptic number.

It is an amenable number.

540003303221 is a deficient number, since it is larger than the sum of its proper divisors (3121406551).

540003303221 is a wasteful number, since it uses less digits than its factorization.

540003303221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3121406550.

The product of its (nonzero) digits is 2160, while the sum is 23.

Adding to 540003303221 its reverse (122303300045), we get a palindrome (662306603266).

The spelling of 540003303221 in words is "five hundred forty billion, three million, three hundred three thousand, two hundred twenty-one".