540273209 has 8 divisors (see below), whose sum is σ = 653776128. Its totient is φ = 435850560.

The previous prime is 540273203. The next prime is 540273221. The reversal of 540273209 is 902372045.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 540273209 - 2¹² = 540269113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (540273203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2269937 + ... + 2270174.

It is an arithmetic number, because the mean of its divisors is an integer number (81722016).

Almost surely, 2^540273209 is an apocalyptic number.

It is an amenable number.

540273209 is a deficient number, since it is larger than the sum of its proper divisors (113502919).

540273209 is a wasteful number, since it uses less digits than its factorization.

540273209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4540135.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 540273209 is about 23243.7778555897. Note that the first 3 decimals coincide. The cubic root of 540273209 is about 814.4625957726.

The spelling of 540273209 in words is "five hundred forty million, two hundred seventy-three thousand, two hundred nine".