540550261 has 4 divisors (see below), whose sum is σ = 540617152. Its totient is φ = 540483372.

The previous prime is 540550223. The next prime is 540550313. The reversal of 540550261 is 162055045.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 540550261 - 2¹¹ = 540548213 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 (540550201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19341 + ... + 38146.

It is an arithmetic number, because the mean of its divisors is an integer number (135154288).

Almost surely, 2^540550261 is an apocalyptic number.

It is an amenable number.

540550261 is a deficient number, since it is larger than the sum of its proper divisors (66891).

540550261 is an equidigital number, since it uses as much as digits as its factorization.

540550261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66890.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 540550261 is about 23249.7367942091. The cubic root of 540550261 is about 814.6017907376.

The spelling of 540550261 in words is "five hundred forty million, five hundred fifty thousand, two hundred sixty-one".