223031213 has 4 divisors (see below), whose sum is σ = 223064028. Its totient is φ = 222998400.

The previous prime is 223031203. The next prime is 223031233. The reversal of 223031213 is 312130322.

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 217208644 + 5822569 = 14738^2 + 2413^2 .

It is a cyclic number.

It is not a de Polignac number, because 223031213 - 2¹⁴ = 223014829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 223031191 and 223031200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223031203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1988 + ... + 21213.

It is an arithmetic number, because the mean of its divisors is an integer number (55766007).

Almost surely, 2^223031213 is an apocalyptic number.

It is an amenable number.

223031213 is a deficient number, since it is larger than the sum of its proper divisors (32815).

223031213 is an equidigital number, since it uses as much as digits as its factorization.

223031213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32814.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 223031213 is about 14934.2295750400. The cubic root of 223031213 is about 606.4409910449.

Adding to 223031213 its reverse (312130322), we get a palindrome (535161535).

The spelling of 223031213 in words is "two hundred twenty-three million, thirty-one thousand, two hundred thirteen".