220045231 has 12 divisors (see below), whose sum is σ = 256221840. Its totient is φ = 188425440.

The previous prime is 220045187. The next prime is 220045247. The reversal of 220045231 is 132540022.

It is not a de Polignac number, because 220045231 - 2¹¹ = 220043183 is a prime.

It is a super-2 number, since 2×220045231² = 96839807371686722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 220045199 and 220045208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220045831) 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 11 ways as a sum of consecutive naturals, for example, 77446 + ... + 80236.

It is an arithmetic number, because the mean of its divisors is an integer number (21351820).

Almost surely, 2^220045231 is an apocalyptic number.

220045231 is a deficient number, since it is larger than the sum of its proper divisors (36176609).

220045231 is a wasteful number, since it uses less digits than its factorization.

220045231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4414 (or 4407 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 220045231 is about 14833.9216325286. The cubic root of 220045231 is about 603.7224422064.

Adding to 220045231 its reverse (132540022), we get a palindrome (352585253).

The spelling of 220045231 in words is "two hundred twenty million, forty-five thousand, two hundred thirty-one".