243224161 has 8 divisors (see below), whose sum is σ = 246024864. Its totient is φ = 240433440.

The previous prime is 243224153. The next prime is 243224207. The reversal of 243224161 is 161422342.

It is a happy number.

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 243224161 - 2³ = 243224153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243221161) 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, 53566 + ... + 57928.

It is an arithmetic number, because the mean of its divisors is an integer number (30753108).

Almost surely, 2^243224161 is an apocalyptic number.

It is an amenable number.

243224161 is a deficient number, since it is larger than the sum of its proper divisors (2800703).

243224161 is a wasteful number, since it uses less digits than its factorization.

243224161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4991.

The product of its digits is 2304, while the sum is 25.

The square root of 243224161 is about 15595.6455781734. The cubic root of 243224161 is about 624.2169701124.

The spelling of 243224161 in words is "two hundred forty-three million, two hundred twenty-four thousand, one hundred sixty-one".