243161243 has 8 divisors (see below), whose sum is σ = 266305200. Its totient is φ = 220651488.

The previous prime is 243161239. The next prime is 243161257. The reversal of 243161243 is 342161342.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 243161243 - 2² = 243161239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243161273) 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 7 ways as a sum of consecutive naturals, for example, 157748 + ... + 159281.

It is an arithmetic number, because the mean of its divisors is an integer number (33288150).

Almost surely, 2^243161243 is an apocalyptic number.

243161243 is a deficient number, since it is larger than the sum of its proper divisors (23143957).

243161243 is a wasteful number, since it uses less digits than its factorization.

243161243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317101.

The product of its digits is 3456, while the sum is 26.

The square root of 243161243 is about 15593.6282820901. The cubic root of 243161243 is about 624.1631406598.

Subtracting 243161243 from its reverse (342161342), we obtain a palindrome (99000099).

The spelling of 243161243 in words is "two hundred forty-three million, one hundred sixty-one thousand, two hundred forty-three".