243200213 has 4 divisors (see below), whose sum is σ = 243231948. Its totient is φ = 243168480.

The previous prime is 243200207. The next prime is 243200219. The reversal of 243200213 is 312002342.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 312002342 = 2 ⋅156001171.

It is an interprime number because it is at equal distance from previous prime (243200207) and next prime (243200219).

It can be written as a sum of positive squares in 2 ways, for example, as 180821809 + 62378404 = 13447^2 + 7898^2 .

It is a cyclic number.

It is not a de Polignac number, because 243200213 - 2¹⁰ = 243199189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 243200191 and 243200200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243200219) 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, 3545 + ... + 22337.

It is an arithmetic number, because the mean of its divisors is an integer number (60807987).

Almost surely, 2^243200213 is an apocalyptic number.

It is an amenable number.

243200213 is a deficient number, since it is larger than the sum of its proper divisors (31735).

243200213 is a wasteful number, since it uses less digits than its factorization.

243200213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31734.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 243200213 is about 15594.8777808613. The cubic root of 243200213 is about 624.1964825115.

Adding to 243200213 its reverse (312002342), we get a palindrome (555202555).

The spelling of 243200213 in words is "two hundred forty-three million, two hundred thousand, two hundred thirteen".