540224121 has 4 divisors (see below), whose sum is σ = 720298832. Its totient is φ = 360149412.

The previous prime is 540224117. The next prime is 540224129. The reversal of 540224121 is 121422045.

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 not a de Polignac number, because 540224121 - 2² = 540224117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (540224129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90037351 + ... + 90037356.

It is an arithmetic number, because the mean of its divisors is an integer number (180074708).

Almost surely, 2^540224121 is an apocalyptic number.

It is an amenable number.

540224121 is a deficient number, since it is larger than the sum of its proper divisors (180074711).

540224121 is a wasteful number, since it uses less digits than its factorization.

540224121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180074710.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 540224121 is about 23242.7218931002. The cubic root of 540224121 is about 814.4379282833.

Adding to 540224121 its reverse (121422045), we get a palindrome (661646166).

The spelling of 540224121 in words is "five hundred forty million, two hundred twenty-four thousand, one hundred twenty-one".