540136543 has 4 divisors (see below), whose sum is σ = 540803368. Its totient is φ = 539469720.

The previous prime is 540136537. The next prime is 540136559. The reversal of 540136543 is 345631045.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 540136543 - 2⁵ = 540136511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (540136573) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 332196 + ... + 333817.

It is an arithmetic number, because the mean of its divisors is an integer number (135200842).

Almost surely, 2^540136543 is an apocalyptic number.

540136543 is a deficient number, since it is larger than the sum of its proper divisors (666825).

540136543 is an equidigital number, since it uses as much as digits as its factorization.

540136543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666824.

The product of its (nonzero) digits is 21600, while the sum is 31.

The square root of 540136543 is about 23240.8378291317. The cubic root of 540136543 is about 814.3939152544.

Adding to 540136543 its reverse (345631045), we get a palindrome (885767588).

The spelling of 540136543 in words is "five hundred forty million, one hundred thirty-six thousand, five hundred forty-three".