5220812111 has 4 divisors (see below), whose sum is σ = 5225082192. Its totient is φ = 5216542032.

The previous prime is 5220812089. The next prime is 5220812141. The reversal of 5220812111 is 1112180225.

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-5220812111 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 (5220812141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2133206 + ... + 2135651.

It is an arithmetic number, because the mean of its divisors is an integer number (1306270548).

Almost surely, 2^5220812111 is an apocalyptic number.

5220812111 is a deficient number, since it is larger than the sum of its proper divisors (4270081).

5220812111 is a wasteful number, since it uses less digits than its factorization.

5220812111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4270080.

The product of its (nonzero) digits is 320, while the sum is 23.

The square root of 5220812111 is about 72255.1874331525. The cubic root of 5220812111 is about 1734.7864499213.

Adding to 5220812111 its reverse (1112180225), we get a palindrome (6332992336).

The spelling of 5220812111 in words is "five billion, two hundred twenty million, eight hundred twelve thousand, one hundred eleven".