243132245 has 4 divisors (see below), whose sum is σ = 291758700. Its totient is φ = 194505792.

The previous prime is 243132233. The next prime is 243132251. The reversal of 243132245 is 542231342.

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

It can be written as a sum of positive squares in 2 ways, for example, as 80748196 + 162384049 = 8986^2 + 12743^2 .

It is a cyclic number.

It is not a de Polignac number, because 243132245 - 2²⁰ = 242083669 is a prime.

It is a super-2 number, since 2×243132245² = 118226577117480050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 24313220 + ... + 24313229.

It is an arithmetic number, because the mean of its divisors is an integer number (72939675).

Almost surely, 2^243132245 is an apocalyptic number.

It is an amenable number.

243132245 is a deficient number, since it is larger than the sum of its proper divisors (48626455).

243132245 is an equidigital number, since it uses as much as digits as its factorization.

243132245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48626454.

The product of its digits is 5760, while the sum is 26.

The square root of 243132245 is about 15592.6984515189. The cubic root of 243132245 is about 624.1383283143.

Adding to 243132245 its reverse (542231342), we get a palindrome (785363587).

The spelling of 243132245 in words is "two hundred forty-three million, one hundred thirty-two thousand, two hundred forty-five".