540527821 has 2 divisors, whose sum is σ = 540527822. Its totient is φ = 540527820.

The previous prime is 540527803. The next prime is 540527831. The reversal of 540527821 is 128725045.

It is a happy number.

540527821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 539865225 + 662596 = 23235^2 + 814^2 .

It is a cyclic number.

It is not a de Polignac number, because 540527821 - 2¹⁹ = 540003533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (540527831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 270263910 + 270263911.

It is an arithmetic number, because the mean of its divisors is an integer number (270263911).

Almost surely, 2^540527821 is an apocalyptic number.

It is an amenable number.

540527821 is a deficient number, since it is larger than the sum of its proper divisors (1).

540527821 is an equidigital number, since it uses as much as digits as its factorization.

540527821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22400, while the sum is 34.

The square root of 540527821 is about 23249.2542030922. The cubic root of 540527821 is about 814.5905183247.

The spelling of 540527821 in words is "five hundred forty million, five hundred twenty-seven thousand, eight hundred twenty-one".