4205540111 has 4 divisors (see below), whose sum is σ = 4247179224. Its totient is φ = 4163901000.

The previous prime is 4205540093. The next prime is 4205540113. The reversal of 4205540111 is 1110455024.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4205540111 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 (4205540113) 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, 20819405 + ... + 20819606.

It is an arithmetic number, because the mean of its divisors is an integer number (1061794806).

Almost surely, 2^4205540111 is an apocalyptic number.

4205540111 is a deficient number, since it is larger than the sum of its proper divisors (41639113).

4205540111 is a wasteful number, since it uses less digits than its factorization.

4205540111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41639112.

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 4205540111 is about 64850.1357824330. The cubic root of 4205540111 is about 1614.1377449494.

Adding to 4205540111 its reverse (1110455024), we get a palindrome (5315995135).

The spelling of 4205540111 in words is "four billion, two hundred five million, five hundred forty thousand, one hundred eleven".