213144224 has 24 divisors (see below), whose sum is σ = 420838740. Its totient is φ = 106264576.

The previous prime is 213144221. The next prime is 213144233. The reversal of 213144224 is 422441312.

It can be written as a sum of positive squares in 2 ways, for example, as 197683600 + 15460624 = 14060^2 + 3932^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 213144224.

It is not an unprimeable number, because it can be changed into a prime (213144221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1862 + ... + 20730.

Almost surely, 2^213144224 is an apocalyptic number.

It is an amenable number.

213144224 is a deficient number, since it is larger than the sum of its proper divisors (207694516).

213144224 is a wasteful number, since it uses less digits than its factorization.

213144224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19232 (or 19224 counting only the distinct ones).

The product of its digits is 1536, while the sum is 23.

The square root of 213144224 is about 14599.4597160306. The cubic root of 213144224 is about 597.3440232905.

Adding to 213144224 its reverse (422441312), we get a palindrome (635585536).

The spelling of 213144224 in words is "two hundred thirteen million, one hundred forty-four thousand, two hundred twenty-four".