540115021 has 8 divisors (see below), whose sum is σ = 547493120. Its totient is φ = 532750608.

The previous prime is 540115019. The next prime is 540115031. The reversal of 540115021 is 120511045.

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 540115021 - 2¹ = 540115019 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 540115021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (540115031) 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, 94960 + ... + 100486.

It is an arithmetic number, because the mean of its divisors is an integer number (68436640).

Almost surely, 2^540115021 is an apocalyptic number.

It is an amenable number.

540115021 is a deficient number, since it is larger than the sum of its proper divisors (7378099).

540115021 is a wasteful number, since it uses less digits than its factorization.

540115021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6843.

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 540115021 is about 23240.3748033460. The cubic root of 540115021 is about 814.3830984718.

Adding to 540115021 its reverse (120511045), we get a palindrome (660626066).

The spelling of 540115021 in words is "five hundred forty million, one hundred fifteen thousand, twenty-one".