540355021 has 2 divisors, whose sum is σ = 540355022. Its totient is φ = 540355020.

The previous prime is 540355007. The next prime is 540355037. The reversal of 540355021 is 120553045.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 491508900 + 48846121 = 22170^2 + 6989^2 .

It is a cyclic number.

It is not a de Polignac number, because 540355021 - 2²⁵ = 506800589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (540350021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 270177510 + 270177511.

It is an arithmetic number, because the mean of its divisors is an integer number (270177511).

Almost surely, 2^540355021 is an apocalyptic number.

It is an amenable number.

540355021 is a deficient number, since it is larger than the sum of its proper divisors (1).

540355021 is an equidigital number, since it uses as much as digits as its factorization.

540355021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 540355021 is about 23245.5376577957. The cubic root of 540355021 is about 814.5037042647.

The spelling of 540355021 in words is "five hundred forty million, three hundred fifty-five thousand, twenty-one".