213220209 has 8 divisors (see below), whose sum is σ = 294096960. Its totient is φ = 137245136.

The previous prime is 213220207. The next prime is 213220211. The reversal of 213220209 is 902022312.

It is an interprime number because it is at equal distance from previous prime (213220207) and next prime (213220211).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 213220209 - 2¹ = 213220207 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (213220207) 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 7 ways as a sum of consecutive naturals, for example, 1225317 + ... + 1225490.

It is an arithmetic number, because the mean of its divisors is an integer number (36762120).

Almost surely, 2^213220209 is an apocalyptic number.

213220209 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

213220209 is a deficient number, since it is larger than the sum of its proper divisors (80876751).

213220209 is a wasteful number, since it uses less digits than its factorization.

213220209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2450839.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 213220209 is about 14602.0618064710. The cubic root of 213220209 is about 597.4149983829.

The spelling of 213220209 in words is "two hundred thirteen million, two hundred twenty thousand, two hundred nine".