540521843 has 2 divisors, whose sum is σ = 540521844. Its totient is φ = 540521842.

The previous prime is 540521809. The next prime is 540521869. The reversal of 540521843 is 348125045.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-540521843 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (540521893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 270260921 + 270260922.

It is an arithmetic number, because the mean of its divisors is an integer number (270260922).

Almost surely, 2^540521843 is an apocalyptic number.

540521843 is a deficient number, since it is larger than the sum of its proper divisors (1).

540521843 is an equidigital number, since it uses as much as digits as its factorization.

540521843 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19200, while the sum is 32.

The square root of 540521843 is about 23249.1256394730. The cubic root of 540521843 is about 814.5875153093.

Adding to 540521843 its reverse (348125045), we get a palindrome (888646888).

The spelling of 540521843 in words is "five hundred forty million, five hundred twenty-one thousand, eight hundred forty-three".