220343209 has 12 divisors (see below), whose sum is σ = 233226864. Its totient is φ = 208139832.

The previous prime is 220343203. The next prime is 220343219. The reversal of 220343209 is 902343022.

It is not a de Polignac number, because 220343209 - 2¹¹ = 220341161 is a prime.

It is a super-2 number, since 2×220343209² = 97102259504835362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220343203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 167934 + ... + 169240.

It is an arithmetic number, because the mean of its divisors is an integer number (19435572).

Almost surely, 2^220343209 is an apocalyptic number.

It is an amenable number.

220343209 is a deficient number, since it is larger than the sum of its proper divisors (12883655).

220343209 is a wasteful number, since it uses less digits than its factorization.

220343209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1812 (or 1793 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 220343209 is about 14843.9620384855. The cubic root of 220343209 is about 603.9948329675.

The spelling of 220343209 in words is "two hundred twenty million, three hundred forty-three thousand, two hundred nine".