213200221 has 4 divisors (see below), whose sum is σ = 229600252. Its totient is φ = 196800192.

The previous prime is 213200203. The next prime is 213200227. The reversal of 213200221 is 122002312.

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

It can be written as a sum of positive squares in 2 ways, for example, as 16892100 + 196308121 = 4110^2 + 14011^2 .

It is a cyclic number.

It is not a de Polignac number, because 213200221 - 2⁷ = 213200093 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 16400017 = 213200221 / (2 + 1 + 3 + 2 + 0 + 0 + 2 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213200227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8199996 + ... + 8200021.

It is an arithmetic number, because the mean of its divisors is an integer number (57400063).

Almost surely, 2^213200221 is an apocalyptic number.

It is an amenable number.

213200221 is a deficient number, since it is larger than the sum of its proper divisors (16400031).

213200221 is a wasteful number, since it uses less digits than its factorization.

213200221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16400030.

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

The square root of 213200221 is about 14601.3773665364. The cubic root of 213200221 is about 597.3963298833.

Adding to 213200221 its reverse (122002312), we get a palindrome (335202533).

The spelling of 213200221 in words is "two hundred thirteen million, two hundred thousand, two hundred twenty-one".