243361261 has 8 divisors (see below), whose sum is σ = 285907104. Its totient is φ = 204219120.

The previous prime is 243361259. The next prime is 243361289. The reversal of 243361261 is 162163342.

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 243361261 - 2¹ = 243361259 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243361211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 850771 + ... + 851056.

It is an arithmetic number, because the mean of its divisors is an integer number (35738388).

Almost surely, 2^243361261 is an apocalyptic number.

It is an amenable number.

243361261 is a deficient number, since it is larger than the sum of its proper divisors (42545843).

243361261 is a wasteful number, since it uses less digits than its factorization.

243361261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1701851.

The product of its digits is 5184, while the sum is 28.

The square root of 243361261 is about 15600.0404166143. The cubic root of 243361261 is about 624.3342337804.

The spelling of 243361261 in words is "two hundred forty-three million, three hundred sixty-one thousand, two hundred sixty-one".