213304233 has 4 divisors (see below), whose sum is σ = 284405648. Its totient is φ = 142202820.

The previous prime is 213304229. The next prime is 213304237. The reversal of 213304233 is 332403312.

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 an interprime number because it is at equal distance from previous prime (213304229) and next prime (213304237).

It is not a de Polignac number, because 213304233 - 2² = 213304229 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (213304237) 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, 35550703 + ... + 35550708.

It is an arithmetic number, because the mean of its divisors is an integer number (71101412).

Almost surely, 2^213304233 is an apocalyptic number.

It is an amenable number.

213304233 is a deficient number, since it is larger than the sum of its proper divisors (71101415).

213304233 is an equidigital number, since it uses as much as digits as its factorization.

213304233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71101414.

The product of its (nonzero) digits is 1296, while the sum is 21.

The square root of 213304233 is about 14604.9386510180. The cubic root of 213304233 is about 597.4934628114.

Adding to 213304233 its reverse (332403312), we get a palindrome (545707545).

The spelling of 213304233 in words is "two hundred thirteen million, three hundred four thousand, two hundred thirty-three".