213233243 has 4 divisors (see below), whose sum is σ = 213708600. Its totient is φ = 212757888.

The previous prime is 213233233. The next prime is 213233263. The reversal of 213233243 is 342332312.

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

It is a cyclic number.

It is not a de Polignac number, because 213233243 - 2²⁴ = 196456027 is a prime.

It is a super-3 number, since 3×213233243³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213233203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 237005 + ... + 237902.

It is an arithmetic number, because the mean of its divisors is an integer number (53427150).

Almost surely, 2^213233243 is an apocalyptic number.

213233243 is a deficient number, since it is larger than the sum of its proper divisors (475357).

213233243 is an equidigital number, since it uses as much as digits as its factorization.

213233243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475356.

The product of its digits is 2592, while the sum is 23.

The square root of 213233243 is about 14602.5081064864. The cubic root of 213233243 is about 597.4271713198.

Adding to 213233243 its reverse (342332312), we get a palindrome (555565555).

The spelling of 213233243 in words is "two hundred thirteen million, two hundred thirty-three thousand, two hundred forty-three".