223131213 has 8 divisors (see below), whose sum is σ = 330564800. Its totient is φ = 148754124.

The previous prime is 223131187. The next prime is 223131247. The reversal of 223131213 is 312131322.

It is a de Polignac number, because none of the positive numbers 2^k-223131213 is a prime.

It is a super-3 number, since 3×223131213³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223131283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4132033 + ... + 4132086.

It is an arithmetic number, because the mean of its divisors is an integer number (41320600).

Almost surely, 2^223131213 is an apocalyptic number.

It is an amenable number.

223131213 is a deficient number, since it is larger than the sum of its proper divisors (107433587).

223131213 is an equidigital number, since it uses as much as digits as its factorization.

223131213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8264128 (or 8264122 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 223131213 is about 14937.5772131896. The cubic root of 223131213 is about 606.5316136936.

Adding to 223131213 its reverse (312131322), we get a palindrome (535262535).

The spelling of 223131213 in words is "two hundred twenty-three million, one hundred thirty-one thousand, two hundred thirteen".