220001266 has 32 divisors (see below), whose sum is σ = 357120000. Its totient is φ = 101317392.

The previous prime is 220001261. The next prime is 220001273. The reversal of 220001266 is 662100022.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is not an unprimeable number, because it can be changed into a prime (220001261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 355105 + ... + 355723.

It is an arithmetic number, because the mean of its divisors is an integer number (11160000).

Almost surely, 2^220001266 is an apocalyptic number.

220001266 is a deficient number, since it is larger than the sum of its proper divisors (137118734).

220001266 is a wasteful number, since it uses less digits than its factorization.

220001266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 886.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 220001266 is about 14832.4396509812. The cubic root of 220001266 is about 603.6822316476.

Adding to 220001266 its reverse (662100022), we get a palindrome (882101288).

The spelling of 220001266 in words is "two hundred twenty million, one thousand, two hundred sixty-six".