220220001 has 24 divisors (see below), whose sum is σ = 329189120. Its totient is φ = 141717600.

The previous prime is 220219991. The next prime is 220220053. The reversal of 220220001 is 100022022.

It is not a de Polignac number, because 220220001 - 2⁷ = 220219873 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220220201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 150210 + ... + 151668.

Almost surely, 2^220220001 is an apocalyptic number.

It is an amenable number.

220220001 is a deficient number, since it is larger than the sum of its proper divisors (108969119).

220220001 is a wasteful number, since it uses less digits than its factorization.

220220001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2037 (or 2034 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 220220001 is about 14839.8113532484. The cubic root of 220220001 is about 603.8822345800.

Adding to 220220001 its reverse (100022022), we get a palindrome (320242023).

The spelling of 220220001 in words is "two hundred twenty million, two hundred twenty thousand, one".