220501806 has 16 divisors (see below), whose sum is σ = 504004224. Its totient is φ = 63000504.

The previous prime is 220501777. The next prime is 220501843. The reversal of 220501806 is 608105022.

220501806 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2624980 + ... + 2625063.

It is an arithmetic number, because the mean of its divisors is an integer number (31500264).

Almost surely, 2^220501806 is an apocalyptic number.

220501806 is an abundant number, since it is smaller than the sum of its proper divisors (283502418).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

220501806 is a wasteful number, since it uses less digits than its factorization.

220501806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5250055.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 220501806 is about 14849.3032159762. The cubic root of 220501806 is about 604.1397111863.

Adding to 220501806 its reverse (608105022), we get a palindrome (828606828).

The spelling of 220501806 in words is "two hundred twenty million, five hundred one thousand, eight hundred six".