220540111 has 4 divisors (see below), whose sum is σ = 240589224. Its totient is φ = 200491000.

The previous prime is 220540097. The next prime is 220540139. The reversal of 220540111 is 111045022.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 220540111 - 2¹³ = 220531919 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 (220540211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10024540 + ... + 10024561.

It is an arithmetic number, because the mean of its divisors is an integer number (60147306).

Almost surely, 2^220540111 is an apocalyptic number.

220540111 is a deficient number, since it is larger than the sum of its proper divisors (20049113).

220540111 is a wasteful number, since it uses less digits than its factorization.

220540111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20049112.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 220540111 is about 14850.5929511249. The cubic root of 220540111 is about 604.1746923537.

Adding to 220540111 its reverse (111045022), we get a palindrome (331585133).

The spelling of 220540111 in words is "two hundred twenty million, five hundred forty thousand, one hundred eleven".