220681220 has 12 divisors (see below), whose sum is σ = 463430604. Its totient is φ = 88272480.

The previous prime is 220681217. The next prime is 220681231. The reversal of 220681220 is 22186022.

220681220 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 98446084 + 122235136 = 9922^2 + 11056^2 .

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5517011 + ... + 5517050.

It is an arithmetic number, because the mean of its divisors is an integer number (38619217).

Almost surely, 2^220681220 is an apocalyptic number.

220681220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220681220 is an abundant number, since it is smaller than the sum of its proper divisors (242749384).

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

220681220 is a wasteful number, since it uses less digits than its factorization.

220681220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11034070 (or 11034068 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 220681220 is about 14855.3431464911. The cubic root of 220681220 is about 604.3035219951.

The spelling of 220681220 in words is "two hundred twenty million, six hundred eighty-one thousand, two hundred twenty".