213303333 has 4 divisors (see below), whose sum is σ = 284404448. Its totient is φ = 142202220.

The previous prime is 213303313. The next prime is 213303373. The reversal of 213303333 is 333303312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 213303333 - 2⁶ = 213303269 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213303313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35550553 + ... + 35550558.

It is an arithmetic number, because the mean of its divisors is an integer number (71101112).

Almost surely, 2^213303333 is an apocalyptic number.

It is an amenable number.

213303333 is a deficient number, since it is larger than the sum of its proper divisors (71101115).

213303333 is an equidigital number, since it uses as much as digits as its factorization.

213303333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71101114.

The product of its (nonzero) digits is 1458, while the sum is 21.

The square root of 213303333 is about 14604.9078394901. The cubic root of 213303333 is about 597.4926224704.

Subtracting from 213303333 its sum of digits (21), we obtain a palindrome (213303312).

Adding to 213303333 its reverse (333303312), we get a palindrome (546606645).

The spelling of 213303333 in words is "two hundred thirteen million, three hundred three thousand, three hundred thirty-three".