243161113 has 4 divisors (see below), whose sum is σ = 261865828. Its totient is φ = 224456400.

The previous prime is 243161099. The next prime is 243161123. The reversal of 243161113 is 311161342.

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 118548544 + 124612569 = 10888^2 + 11163^2 .

It is a cyclic number.

It is not a de Polignac number, because 243161113 - 2¹⁷ = 243030041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243161123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9352338 + ... + 9352363.

It is an arithmetic number, because the mean of its divisors is an integer number (65466457).

Almost surely, 2^243161113 is an apocalyptic number.

It is an amenable number.

243161113 is a deficient number, since it is larger than the sum of its proper divisors (18704715).

243161113 is a wasteful number, since it uses less digits than its factorization.

243161113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18704714.

The product of its digits is 432, while the sum is 22.

The square root of 243161113 is about 15593.6241137203. The cubic root of 243161113 is about 624.1630294287.

It can be divided in two parts, 2431 and 61113, that multiplied together give a triangular number (148565703 = T₁₇₂₃₇).

The spelling of 243161113 in words is "two hundred forty-three million, one hundred sixty-one thousand, one hundred thirteen".