540253543021 has 2 divisors, whose sum is σ = 540253543022. Its totient is φ = 540253543020.

The previous prime is 540253543013. The next prime is 540253543073. The reversal of 540253543021 is 120345352045.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 377562320521 + 162691222500 = 614461^2 + 403350^2 .

It is a cyclic number.

It is not a de Polignac number, because 540253543021 - 2³ = 540253543013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (540253544021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 270126771510 + 270126771511.

It is an arithmetic number, because the mean of its divisors is an integer number (270126771511).

Almost surely, 2^540253543021 is an apocalyptic number.

It is an amenable number.

540253543021 is a deficient number, since it is larger than the sum of its proper divisors (1).

540253543021 is an equidigital number, since it uses as much as digits as its factorization.

540253543021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72000, while the sum is 34.

Adding to 540253543021 its reverse (120345352045), we get a palindrome (660598895066).

The spelling of 540253543021 in words is "five hundred forty billion, two hundred fifty-three million, five hundred forty-three thousand, twenty-one".