540506191 has 4 divisors (see below), whose sum is σ = 541382832. Its totient is φ = 539629552.

The previous prime is 540506159. The next prime is 540506221. The reversal of 540506191 is 191605045.

540506191 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 540506191 - 2⁵ = 540506159 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 (540576191) 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, 437395 + ... + 438628.

It is an arithmetic number, because the mean of its divisors is an integer number (135345708).

Almost surely, 2^540506191 is an apocalyptic number.

540506191 is a deficient number, since it is larger than the sum of its proper divisors (876641).

540506191 is an equidigital number, since it uses as much as digits as its factorization.

540506191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876640.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 540506191 is about 23248.7890222265. The cubic root of 540506191 is about 814.5796525085.

The spelling of 540506191 in words is "five hundred forty million, five hundred six thousand, one hundred ninety-one".