213303243 has 4 divisors (see below), whose sum is σ = 284404328. Its totient is φ = 142202160.

The previous prime is 213303229. The next prime is 213303269. The reversal of 213303243 is 342303312.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 213303243 - 2⁶ = 213303179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213303283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35550538 + ... + 35550543.

It is an arithmetic number, because the mean of its divisors is an integer number (71101082).

Almost surely, 2^213303243 is an apocalyptic number.

213303243 is a deficient number, since it is larger than the sum of its proper divisors (71101085).

213303243 is an equidigital number, since it uses as much as digits as its factorization.

213303243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71101084.

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

The square root of 213303243 is about 14604.9047583338. The cubic root of 213303243 is about 597.4925384361.

Adding to 213303243 its reverse (342303312), we get a palindrome (555606555).

The spelling of 213303243 in words is "two hundred thirteen million, three hundred three thousand, two hundred forty-three".