243192261 has 8 divisors (see below), whose sum is σ = 349199200. Its totient is φ = 149656752.

The previous prime is 243192223. The next prime is 243192263. The reversal of 243192261 is 162291342.

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

It is not a de Polignac number, because 243192261 - 2¹⁰ = 243191237 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243192263) 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, 3117811 + ... + 3117888.

It is an arithmetic number, because the mean of its divisors is an integer number (43649900).

Almost surely, 2^243192261 is an apocalyptic number.

It is an amenable number.

243192261 is a deficient number, since it is larger than the sum of its proper divisors (106006939).

243192261 is a wasteful number, since it uses less digits than its factorization.

243192261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6235715.

The product of its digits is 5184, while the sum is 30.

The square root of 243192261 is about 15594.6228232683. The cubic root of 243192261 is about 624.1896792492.

The spelling of 243192261 in words is "two hundred forty-three million, one hundred ninety-two thousand, two hundred sixty-one".