540541221 has 16 divisors (see below), whose sum is σ = 787358208. Its totient is φ = 327135600.

The previous prime is 540541201. The next prime is 540541249. The reversal of 540541221 is 122145045.

It is not a de Polignac number, because 540541221 - 2⁵ = 540541189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 540541191 and 540541200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (540541201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12726 + ... + 35256.

It is an arithmetic number, because the mean of its divisors is an integer number (49209888).

Almost surely, 2^540541221 is an apocalyptic number.

It is an amenable number.

540541221 is a deficient number, since it is larger than the sum of its proper divisors (246816987).

540541221 is a wasteful number, since it uses less digits than its factorization.

540541221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23272.

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 540541221 is about 23249.5423825933. The cubic root of 540541221 is about 814.5972496605.

Adding to 540541221 its reverse (122145045), we get a palindrome (662686266).

The spelling of 540541221 in words is "five hundred forty million, five hundred forty-one thousand, two hundred twenty-one".