540300221 has 4 divisors (see below), whose sum is σ = 546371100. Its totient is φ = 534229344.

The previous prime is 540300217. The next prime is 540300251. The reversal of 540300221 is 122003045.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122003045 = 5 ⋅24400609.

It can be written as a sum of positive squares in 2 ways, for example, as 132825625 + 407474596 = 11525^2 + 20186^2 .

It is a cyclic number.

It is not a de Polignac number, because 540300221 - 2² = 540300217 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 540300221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (540300251) 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, 3035306 + ... + 3035483.

It is an arithmetic number, because the mean of its divisors is an integer number (136592775).

Almost surely, 2^540300221 is an apocalyptic number.

It is an amenable number.

540300221 is a deficient number, since it is larger than the sum of its proper divisors (6070879).

540300221 is an equidigital number, since it uses as much as digits as its factorization.

540300221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6070878.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 540300221 is about 23244.3589070553. The cubic root of 540300221 is about 814.4761690886.

Adding to 540300221 its reverse (122003045), we get a palindrome (662303266).

The spelling of 540300221 in words is "five hundred forty million, three hundred thousand, two hundred twenty-one".