213224443 has 4 divisors (see below), whose sum is σ = 220577040. Its totient is φ = 205871848.

The previous prime is 213224437. The next prime is 213224447. The reversal of 213224443 is 344422312.

It is a happy number.

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 213224443 - 2⁵ = 213224411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213224447) 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, 3676255 + ... + 3676312.

It is an arithmetic number, because the mean of its divisors is an integer number (55144260).

Almost surely, 2^213224443 is an apocalyptic number.

213224443 is a deficient number, since it is larger than the sum of its proper divisors (7352597).

213224443 is an equidigital number, since it uses as much as digits as its factorization.

213224443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7352596.

The product of its digits is 4608, while the sum is 25.

The square root of 213224443 is about 14602.2067852774. The cubic root of 213224443 is about 597.4189527272.

Adding to 213224443 its reverse (344422312), we get a palindrome (557646755).

The spelling of 213224443 in words is "two hundred thirteen million, two hundred twenty-four thousand, four hundred forty-three".