213223333 has 6 divisors (see below), whose sum is σ = 226503986. Its totient is φ = 200680512.

The previous prime is 213223313. The next prime is 213223343. The reversal of 213223333 is 333322312.

It can be written as a sum of positive squares in 3 ways, for example, as 24930049 + 188293284 = 4993^2 + 13722^2 .

It is a de Polignac number, because none of the positive numbers 2^k-213223333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213223303) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 368610 + ... + 369187.

Almost surely, 2^213223333 is an apocalyptic number.

It is an amenable number.

213223333 is a deficient number, since it is larger than the sum of its proper divisors (13280653).

213223333 is an equidigital number, since it uses as much as digits as its factorization.

213223333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 737831 (or 737814 counting only the distinct ones).

The product of its digits is 1944, while the sum is 22.

The square root of 213223333 is about 14602.1687772741. The cubic root of 213223333 is about 597.4179160478.

Adding to 213223333 its reverse (333322312), we get a palindrome (546545645).

The spelling of 213223333 in words is "two hundred thirteen million, two hundred twenty-three thousand, three hundred thirty-three".