220381211 has 4 divisors (see below), whose sum is σ = 220414152. Its totient is φ = 220348272.

The previous prime is 220381207. The next prime is 220381223. The reversal of 220381211 is 112183022.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 220381211 - 2² = 220381207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220381241) by changing a digit.

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, 2465 + ... + 21138.

It is an arithmetic number, because the mean of its divisors is an integer number (55103538).

Almost surely, 2^220381211 is an apocalyptic number.

220381211 is a deficient number, since it is larger than the sum of its proper divisors (32941).

220381211 is an equidigital number, since it uses as much as digits as its factorization.

220381211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32940.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 220381211 is about 14845.2420323820. The cubic root of 220381211 is about 604.0295540924.

The spelling of 220381211 in words is "two hundred twenty million, three hundred eighty-one thousand, two hundred eleven".