213221223 has 12 divisors (see below), whose sum is σ = 308657440. Its totient is φ = 141837696.

The previous prime is 213221209. The next prime is 213221243. The reversal of 213221223 is 322122312.

It is not a de Polignac number, because 213221223 - 2⁶ = 213221159 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213221196 and 213221205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213221243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21418 + ... + 29751.

Almost surely, 2^213221223 is an apocalyptic number.

213221223 is a deficient number, since it is larger than the sum of its proper divisors (95436217).

213221223 is a wasteful number, since it uses less digits than its factorization.

213221223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51638 (or 51635 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 213221223 is about 14602.0965275538. The cubic root of 213221223 is about 597.4159454130.

Adding to 213221223 its reverse (322122312), we get a palindrome (535343535).

It can be divided in two parts, 213221 and 223, that added together give a square (213444 = 462²).

The spelling of 213221223 in words is "two hundred thirteen million, two hundred twenty-one thousand, two hundred twenty-three".