221200213 has 24 divisors (see below), whose sum is σ = 249612000. Its totient is φ = 195773760.

The previous prime is 221200211. The next prime is 221200249. The reversal of 221200213 is 312002122.

It is not a de Polignac number, because 221200213 - 2¹ = 221200211 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 221200193 and 221200202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221200211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 443038 + ... + 443536.

It is an arithmetic number, because the mean of its divisors is an integer number (10400500).

Almost surely, 2^221200213 is an apocalyptic number.

It is an amenable number.

221200213 is a deficient number, since it is larger than the sum of its proper divisors (28411787).

221200213 is a wasteful number, since it uses less digits than its factorization.

221200213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629 (or 616 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 221200213 is about 14872.8011147867. The cubic root of 221200213 is about 604.7768801365.

Adding to 221200213 its reverse (312002122), we get a palindrome (533202335).

The spelling of 221200213 in words is "two hundred twenty-one million, two hundred thousand, two hundred thirteen".