540421523 has 2 divisors, whose sum is σ = 540421524. Its totient is φ = 540421522.

The previous prime is 540421507. The next prime is 540421537. The reversal of 540421523 is 325124045.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 540421523 - 2⁴ = 540421507 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 540421492 and 540421501.

It is not a weakly prime, because it can be changed into another prime (540421573) 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, 270210761 + 270210762.

It is an arithmetic number, because the mean of its divisors is an integer number (270210762).

Almost surely, 2^540421523 is an apocalyptic number.

540421523 is a deficient number, since it is larger than the sum of its proper divisors (1).

540421523 is an equidigital number, since it uses as much as digits as its factorization.

540421523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 540421523 is about 23246.9680388648. The cubic root of 540421523 is about 814.5371168060.

Adding to 540421523 its reverse (325124045), we get a palindrome (865545568).

The spelling of 540421523 in words is "five hundred forty million, four hundred twenty-one thousand, five hundred twenty-three".